20 weeks pregnant

Im a first time mommy and my boyfriend and I are so excited for our baby girl to make her appearance ☺ one small bump in the road is sex.. I have no desire to have sex, not because of him but because it's awkward knowing there's a baby inside me.. I just can't not do it.. I can't even let him touch me down there. He understands but I know it bothers him and that makes me feel terrible.. anyone dealing with this issue?