I am struggling with anxiety and insecurity while pregnant

I am 6 months pregnant and I am struggling with insecurity within my marriage and myself. I feel so unattractive all the time and I’m scared my husband is not attracted to me anymore. He reassures me that he loves me and is attracted to me, but it’s so difficult to have sex, and honestly he seems to not be as interested. I’ve made myself paranoid that he’s going to cheat on me, to the point where I obsessively check his location multiple times a day. He has given me no reason to think he is cheating, and I really believe I’m making myself go crazy. We just bought a new house and are currently living with my parents until it’s ready, and that has caused stress in our marriage I think. I just don’t know what to do. I am miserable in my own head and I am tired of making myself unhappy.