Pain during sex

I'm 8 weeks pregnant and I almost cry during sex, it's so uncomfortable. It's like severe cramping and bloating every time we do the deed and it makes me nervous that it's bad for the baby. I'm fine after sex, but it's awful when we do it. I haven't told my husband because I don't want to make him feel bad. I'm trying to meet his sexual needs but it's extremely unpleasant for me.