i have the same issue with my husband. its our 1st child and he is worried how sex would affect me during the pregnancy. we tried doing foreplay with no penetration but it still feels awkward with the belly in the way or when baby is kicking. i think its important to have open communication with your husband about marriage sex life and how to best navigate it... importantly, both of you are comfortable.
i think it is better for you to communicate with your husband on this instead