I had placenta previa with my first child. There is no way to stop preterm labor. I was in the hospital on bed rest for 2 months to keep me from going into labor. I'm sure your doctor explained that you will have to have a c-section, instead of a regular delivery. The pains are normal, from what I was told it's just your uterus getting bigger. Your ultra sound goes by the size and measurements of your baby, having placenta previa can cause your baby to be smaller then normal. This does not mean your child will be born small, it just means that you will have to wait till you're further along for your ultra sound to actually seem more correct. Like I said I had placenta previa and my son came out at 7lbs 6oz. Let me know if you have any more questions and I will do my best to try and help you out.

Mama,
thank you for responding. I was starting to wonder if anybody responded to questions other than girls freaking out because their stomach is turning and they can't take a pregnancy test yet because their period isnt due for a few more days. Thank you. :d

I had total placenta previa last year and on march 26th I was admitted to the hospital. I was freaking out because I wasn't due till may 30th and I had 3 small children at home. They told me that the baby would be born early so as to prevent labour. They gave me a steroid shot so the baby's lungs would develope sooner, and then toward the end, I had amniocentesis to test the maturity of the baby's lungs. He was born on may the 7th, weighing in at 7lbs 10 oz. He did have a few small breathing problems at first. But he came home 10 days after being born and is perfectly healthy now.
I never did spot or bleed, I was very crampy and made sure the nurses knew. If you start bleeding, do not hesitate, get to the hospital.
It is possible for your placenta to migrate up though. There was a girl in the hospital at the same time I was in. She had total placenta previa, however in her first amnio, the found her placenta had moved, and she went home.
If you have any questions, please feel free to email me.

Good luck
kim