Will these couple's therapy session make things worse?

My fiancé and I start therapy tomorrow. They’re going to talk to him alone at first, then next week I’ll have to join. As most of you already know, our wedding is a month away and we’ve been having some issues with cold feet. I’m worried about therapy. I know I’m supposed to be open and honest but I feel like I’m going to end up hurting my fiancé with the things I’ll say. I don’t want to tell him it’s awkward to have sex or that I’m not sexually attracted to him at this point. I love him so much and when he hurts, I hurt. I can just imagine the look in his eyes when all my thoughts come pouring out. I’ve given him hints about how I’ve been feeling but not the full blown truth. What if he’s so hurt that he ends things? He’s a very sensitive guy. Things really effect him. And he never forgets or forgives. What if the therapist suggests we break things off? What if physical chemistry can’t be made? I’ve been numb to this for so long but now that therapy starts tomorrow, everything is hitting me like a ton of bricks.