Flying alone at 32 weeks

There’s an opportunity for me to fly to Hawaii in October (I’ll be about 32 weeks) with my husband but I’ll have to fly back alone, about 6 hours (he’s staying back for a bachelor party).

The thought of flying alone for 6 hours at 32 weeks pregnant makes me very very nervous. I’ve told him that I don’t feel comfortable but I’m wondering if I’m just overreacting? He’s been very understanding but I don’t know if I’m just thinking about it too much. I just can’t help but think god forbid something happens and I’m alone on a plane 😞.