No sex 🤦🏼‍♀️

I'm 16 weeks pregnant and my boyfriend and I have not had sex in a month. I'm starting to feel a little unattractive to him I'm not sure if he's scared he's going to hurt the baby or something or maybe he just doesn't desire to have sex with me anymore I don't know. The only thing I can say in his defense is that he works a lot! First job at 5 in the morning off at 10am and then second job at 2pm off at 9 pm. Only day he doesn't have to work both jobs are Tuesday's and Thursday's. But he's a guy all guys think about is sex I hate to think that he's trying to have sex with someone else. Maybe I'm just being paranoid. Any advice? Thanks ladies