Ladies I need your advise, please.

My fiancé said he wanted to wait to have sex until the 2nd trimester. We only had sex like 4 times.. We'll im on the 2nd trimester now, he won't touch me.. when I ask for some he says only a few months left. I gained 15 pounds. I feel like maybe he isnt attracted to me anymore. I'm so pissed off, but sad at the same time.