Is husband turned off by my pregnant belly?

My husband and I only have sex 1x a week or every other week. Not quite as often since getting pregnant. I'm always in the mood but he seems to always push me away or be on his phone. Most of the time when we have sex though it's me giving him oral 70% of the time and 30% is the sex before he finishes. So I only get the pleasure out of sex. Rarely receive oral, maybe once in a while. I am assuming because my body has changed. I have a belly now, gained more weight, and I can't do many positions as we used to. I don't know if he's turned off by my body I would ask but I don't wanna turn it into an argument or he'd just deny it and be the same. I have tried initiating all the time, if not every night. Advice?