What to do!!!

I have an 11month old baby who will be 1 on the 8th and I am 19weeks pregnant but after having my son my sex drive was up and down there was times when I could go forever and be crazy for my hubby and now that I'm pregnant I hardly want it ever anytime he mentions it I just don't feel well and once we start I tell him a quicky. But I want to satisfy him how do I get this sex drive up!!??