Pregnant and no self esteem

So, I'm 17 weeks and 2 days. My boyfriend and I haven't had sex except once in over a week. And even then was a quickie.. I shaved and went the whole 9 yards to try and have sex one day he got home from work. I unbuckled his belt and tried to take his pants off but he just said to stop bc he wasn't in the mood. It's been situations like this multiple days in a row. I feel like I'm a fucking cow and he doesn't find me attractive at all anymore. Idk what else to do. Like I don't turn him on anymore, he doesn't wanna have sex with me anymore, he rarely touches me. It's frustrating and even harder being pregnant with my hormones raging. Am I over reacting or do I have a right to be upset??