Lost my mojo😩 possible tmi?

Sabrina • My first love, my son, is 4 years old and now I am pregnant with a baby girl due 12/23/15!!!
I am 21 weeks pregnant and in the past have had no probably getting "aroused" and "hot and ready" for my husband. Recently even if I feel like I want it and even with all kinds of four play its insanely hard for me to get wet and stay wet down there. He felt down on me forever last night and I just couldnt get off! Even though I find him so attractive and it felt amazing. So we just skipped and went straight to have sex and I was already drying up!! What's the deal??