Getting DH in the mood

Hey guys and gals anyone have advice on how to get DH in the mood to have sex during my fertile period? We have been ttc for two years and we are on our second round of clomid and we only had sex 3 times last month and once this month during my fertile period. When ever I initiate he rolls over and says he is tired. We had a fight this week about this and he just got depressed. I'm so desperate to fall pregnant and sometimes I can become over bearing. Maybe he is scared to have a baby? Idk 😐😩