I am 29 weeks pregnant. why does it hurt so much during intercourse i have to use lots of lubrication and then it feels little better.

Painful Intercourse: I think you may already know the answer. Your vaginal tissue is either not getting fully lubricated naturally, or there is a roughness from the pregnancy causing some irritation to the vaginal lining. Many people find that sexual intercourse is enhanced with some additional lube. I am sure your partner does not want to cause you any additional pain.