Anyone else's pregnancy putting them in severe pain?

Im 37 weeks and for a week now I have had stabbing abdominal pains. I have seen the doctor twice and she insists this is normal pain from my skin and uterus stretching. It has been so bad I can barely walk, have to sleep (2-3 hours per night) sitting up, and spent most of thursday and friday in tears. Today the pains in my side have decreased somewhat but now I'm severely constipated from not going to the bathroom for 3 days. The extra weight from constipation and back up is making my stomach feel like its going to rip off and hit the floor everytime I try to walk even a few feet. I can't wait for him to come....... Anyone else go through anything similar?