I feel for ya sister! I was on bed rest due to preterm labor for 5 weeks with my first, then on bed rest for 13 weeks due to preterm labor with the second. Total nightmare on wheels. Weeks 36-38 were the worst: constipation, pressure down below to the point where I thought the kid was falling out, couldn't get comfortable to sleep, starving but full after 3 bites, heartburn, weepy, anxious, peeing every 30 minutes, contractions every 5 minutes even with my medication. The only good thing was that my hair and my boobs were fantastic. But really, I BEGGED for them to take these kids out of me and my dr. finally relented at 38 weeks with both of them. I know everyone says how hard it is the first few weeks after the baby is born but for me, it wasn't nearly as tough as the end of the pregnancy.
Oddly enough you forget about it completely and when the baby's 3 months old, you're already ready to get pregnant again and do it all over again!
take care - you're almost there,