Am I doing something wrong?

So I’m 11 weeks pregnant nearly and I’ve already googled when I found out at 4 weeks that it is safe to have sex.. and my partner knows that. We have had sex once in nearly 2 months.. we used to always have sex or at least once a week if we was busy.

However he never comes onto me it’s always me trying it on with him, the first excuse was he wasn’t in the mood.. which was unusual as it was a Saturday morning and we had no plans, the second time he was too tired, next he had a headache and the last time I tried it on he was too busy..

Am I doing something wrong? I already feel awful about my body due to changes from the pregnancy.. I try my best to look pretty and to be honest it’s really upsetting.. each time he says sorry and looks sad and I just brush it off because I don’t know what else to say.. is it me?