Am I Pregnant?? I Need Help!!!

I have a very complicated situation. I am 18 years old. I have a 16 month old and I am having pregnancy symptoms once again. Also I was going on and off of my birth control a couple of times. It just got so annoying and difficult. Last month on july 13th I started my period but something was wrong. I woke up in a small puddle of blood. I washed up and decided to use a pad because of the amount of blood coming out. Then about 3 days later it turned into spotting. Dark colored very light bleeding. So I kept taking my birth control for about two more weeks. But I kept forgetting and doubled up every few days but when I forgot I started bleeding red blood again. This was consecutive for 14 days. So I stopped taking birth control. But also ive only had sex twice since then and both were very recently but I am having pregnancy symptoms you experience after about 10 weeks. Such as, one week late and no sign of period, my breast feel like they are "letting down" if you breast fed b4 you know that feeling. Also, I have had milky discharge(no odor or anything abnormal just thicker), really bad acne on back and shoulders, frequency to urinate, faster then usual nail growth, and lots and lots of gassy stomach pain. Also for about 3 days I was bed ridden because of sharp pains in my stomach. Not sure what it was but it was horrible. I went to the hospital twice and had it checked out but all the results were perfect. They never said anything about pregnancy though. But most importantly I took 4 pregnancy tests and all were negative. Also, I have had a lot of very common little signs of being pregnant and that I had with my last little girl. But I am 18 and I have had a successful pregnancy before. I have an intuition that I am but all the scientific stuff is saying no. I dont have a doctor or insurance so I cant just go get a blood test. I need some real help and suggestions. If anyone knows an obgyn, let me know! Please help me!!!