No sex drive

Am I the only one who has no sex drive here? It's insane to me. When I was pregnant with my first son I couldn't get enough sex, wanted it all the time. Even when I'm not pregnant I wanted sex a lot, now I have no interest, can't get wet and even when me and my SO have sex I can't get off! It's so frustrating! Please tell me I'm not the only one. I'm going to be 28 weeks on Saturday.