Please tell me...am I in the wrong here?

So I live in Las Vegas and it’s known for being notoriously hot in the summers. Well this summer isn’t any different other then I’m pregnant. So my husband insists the AC temperature be set at 79 at all times and sometimes even 80 at night. Well during the day I am dying. So I set it to 78 sometimes 77 and he gets so pissed. He hates having a fan on when we sleep. I find myself sleeping with no blankets...and the lightest pajamas I can find. He said he doesn’t want to pay an outrageous power bill...but seriously I’m suffering ...I don’t know what to do or how to compromise on this one. 🤦🏻‍♀️