I had a tooth that needed a root canal when I was a week over my due date. I got a referral to a really good specialist and he drilled to see what was up then put a temporary filling on and put me on antibiotics. The antibiotics helped quickly and I was able to get the root canal done after my dd was born and I had recovered. My dd was 2 weeks late and I had to be induced. It had no effect on her at all. I had a friend who had to get a root canal done each time she had a baby also. I think it is one of the "joys" of pregnancy that you don't often read about. Good luck and I hope the pain is gone soon!