Miscarriage At 14 Weeks ...

On July 25, 2007 I found out I was about 10 weeks pregnant through the health clinic. I did blood work and made a date to go to the doctor on August 28th (She didn't have any earlier appointments.) On August 22st after eating dinner I saw some red blood spotting which got me worried and I went to the Hospital Emergency room. (NO pain). Upon arrival the E/R doctor told me I was having a spontaneous abortion.I told her I wasnt having any pain and she cant make that decision without me getting a proper exam done. Finally the nurse came and got blood test done. Upon receiving the blood results, they looked normal. That doctor then did a physical examination, which was hurting me and I asked her to stop because she was causing me excruciating pain (I know its uncomfortable but it wasnt suppose to be painful. They then did a sonogram that showed the baby was about 11 weeks and was viable and had a good heartbeat. They did find a small hematoma near the placenta. I was then seen by another doctor and he told me that everything looks good and to follow up with my ob/gyn in about a week.None of these doctors were ob/gyn and I was then dicharged. I had some minor brownish blood the next couple of days but was told this would be normal. On the 28th I followed up with the nurse practioner at the clinic and she said everything looks ok and I should take it easy but my sonogram looks normal and my blood test all came back fine and the brown discharge appeared to be normal and the clot was dissolving. On Sept 2, I woke up in the middle of the night with red blood again, went to the Emergency room again and was brought upstairs to the Maternity section, I was seen by a ob/gyn who told me that I had placenta previa and the spotting was from that. They took blood test, sonogram and physical examination everything showed the baby was viable, lots of movement, strong heartbeat and I should just go home and rest. I kept having brownish discharge up until September 10th. I awakened in the middle of the night with my bed wet, this was a pinkish color. On my way to the Hospital I started heavy bleeding. I told the ob/gyn that i had awakened by me being wet but it wasnt urine. It was pink in color not yellow and I just started heavy bleeding. My blood pressure had dropped to about 83/67. They did a songram and a physical examination and said everything looks fine, lots of fetal movement, strong heartbeat and my cervix was closed and they dont understand why I am bleeding. I told them last week when I was there I was diagnosed with placenta previa. The doctor said that she doesn't see any signs of me having placenta previa and she would need to call a high risk pregnancy doctor for advice. This was at 3 am. At 6am they did another sonogram and another physical examination, and explained that my cervix was closed and the baby has lots of movement and strong heartbeat and they would like to keep me in for further observation because of the heavy bleeding and I would be transferred to the high rish maternity ward and be kept for possibly 1-3 days to monitor the bleeding and even told my mother to go home and get some rest (she had brought me in) Around 8 , the shifts had changed and I was seen by another doctor who said he would be taking over for the previous doctor. He also stated that are going to keep me there a few more hours to monitor before bringing me upstairs to high risk maternity. I stated to him I was starting to feel cramping and he stated its from the blood irrating the uterus and he would get me some tylenol. About an hour later, I asked to be put in a bed because I was uncomfortable in the chair and i told them I was hungry which they said that the IV is feeding me and that I might be able to eat my lunch time. They finally put me in a bed and a nurse came in to check my blood pressure but was interrupted by a the tech who wanted to do a sonogram and she stated she would come back to check my blood pressure. Upon return of the nurse, she told me I was being discharged (never took my blood pressure). Stated to me that the sonogram came back good. Baby has strong heartbeat, lots of movement and there isnt nothing more they can do. I asked her about the cramping and the bleeding, she said to use use hot compresses and tylenol for the cramps. I went home around 1 pm, had a cup of soup and fell asleep. I was awakened at around 5:30pm I started feeling painful stabs in my back, couldnt get out of bed. My mother called the ambualance and they put my on a stretcher. Upon my way to the hospital they took my blood pressure and stated it was very low and I explained to them I was earlier in the hospital and was discharged. The paramedic told me she finds it weird that I was discharged with the heavy bleeding and with such low blood pressure. The machine was beeping because my blood pressure was so low.(when i was discharged nobody checked my blood pressure just my temperature and a sonogram) I ended up miscarrying in the ambulance. Upon arrival at the hospital the fetus had already expelled out of my body. They took the fetus to pathology for examination. I was put on an IV and was given 2 morphine shots for the pain. I had a sonogram done and a physical examination make sure there were no remains. When the bleeding subsided and my blood pressure was stabalized. I was discharged at around 1 am. Why did the first doctor state they were gonna admit me for observation and once the shifts changed the other doctor sent me home? I'm basically looking for answers as to why this happened and if stated in the hospital would the outcome been different? And why all the different diagnoses? I was bleeding for more then 12 hours non-stop what about the blood transfusion? If I was bleeding so much wouldnt that mean the baby is not getting enough blood?
I know nothing will bring my baby back but I am so confused as to what happened. Your feedback would be greatly appreciated thank you..