BF won't have sex

Erin

I'm to a point where idk what to do.. we've been together for four years, have a two year old son, and I'm 6 weeks with our second.

Every time I try and comes up with some excuse. My birthday was yesterday and when I tried he told me we don't have time for that.. I know I'm extra emotional right now but all I want to do is cry.

Whenever I bring it up to him he says I'm full of shit... :(