Boyfriend doesn’t want to have sex

Hello, so me and my boyfriend been together for about 6 months now ,and lately he hasn’t been really want to have sex with me all of a sudden .we haven’t had sex in almost two weeks.Now don’t get me wrong sometimes I know you might not be in the mood which is cool, but 2 weeks ? We be with each other everyday I just had a baby so my confidence is low asl lol ... so I’m adjusting to my new self still (baby 7 months ) now what is you guys opinion on this ????I want to bring it up but I don’t wanna start an argument he would rather me give him head until he cum instead ....