Pregnant and wanting sex

Nikole
When me and my husband first started dating all the way up to getting married n getting pregnant I didn't have to ask to have sex. Now that we got pregnant it's like our sex life died I ask him almost every night can we have sex his excuse is I'm tired my body aches (he's a construction worker) my hormones are crazy and I'm always in the mood. I'll even try to start it but nothing. Idk what to try or do anymore! I feel unwanted fat n ugly bc he doesn't try to have sex with me what can I do ???