No sex since pregnant, anyone thoughts?

My husband won't have sex with me since I became pregnant. I am not sure at this point why. When I first became pregnant my doctor told me no sex for medical concerns but that has been lifted mid May. On May 30th my husband said when ever I am ready let him know. And now he just won't 😟. 
I told him yesterday afternoon that we will have the house to ourself that night and he said he is still using the medicine for jock itch and he has 1 more week to go (doesn't  want to pass anything to me and get me sick). So I found the tube of medicine (just now) and it is open but maybe used once. So he lied! 
I just don't know why he won't? I have brought it up to him that if he is not getting it from me he is getting from someone else but he says no. I just don't know what to think or do at this point. Is he just afraid to have sex with me because I am pregnant?  
We have been fighting a lot lately too. I lost in so many ways!