no sex drive from 30 weeks

Hey mummies and mummies to be. Since I clocked 30 weeks I have lost my sex drive. Whenever I try to make love with my husband I never get wet and my vagina hurts if we do end up actually having sex. It's not that I don't wanna have it it's just that I don't feel like having it anymore. I feel sorry for hubby coz he wants to have it and I don't. We now make love once a week that is if I try. Anyone going through the same thing? And what can I do to improve it? I was planning on having sex till the end of my pregnancy since I heard it helps induce labor