I'm almost 21 weeks pregnant and I can't seem to get in the mood. I'll be in the mood for, like, three seconds and then it goes away. I don't know how to fix it or improve it. I feel bad because my boyfriend constantly wants to have sex and I just end up turning him down. He doesn't act bothered by it, but deep down I think he is. We used to have sex all the time, and now we never have it.

Is there anything anyone else has tried that kind of "boosted" their drive? Any advice? Anything?