What would you do?

What would you do if your significant other wouldn’t sleep with you since you’re pregnant ? I’m 6 months and we have only had sex two times since I’ve been pregnant. He says it’s cause he knows there is a baby in there and he just can’t do it but I’m seriously dying of having no sexual attention and he doesn’t get why I can’t just wait till I’m not pregnant. I feel so neglected. Call it childish but when we got together he knew sex was important to me and that doesn’t change just because I am pregnant. Honestly it makes me feel even worse about myself cause I already have low self esteem being all huge ! I don’t know what to do. I never really complain to him but once a month I do cause I need sexual attention !