Sex problems

Okay, so my husband and I have been together for 4 years and sex has ALWAYS been a big issue mainly because we don't have much of it..

I have never been a real sexual person.. I've always blamed it on my past, long story short.. my dad molested me from the age of 6-15.. anyways I had a child at the age of 17 and my sex life just kinda went completely away after I had her. Don't get me wrong.. I had/have sex and I enjoy it very much.. but my sexual drive to initiate it myself is completely gone.. and idk how to fix it.. I'm 25 and expecting my second child but my husband's complaints are that he feels like I'm not sexually attracted to him (which is NOT the case)... I just want to know if anyone else has dealt with this or is there something wrong with me????