I have been having such terrible night sweats for the longest time.
I've been getting hot at night too. I didn't even think about it possibly hurting the baby. I guess it would depend on how hot you are. Since sweating is your body's way of cooling off, I wouldn't think it would hurt you unless your core body temperature got really high as well. I guess you could try checking your temperature when it happens if you are really concerned about it. I usually just end up kicking the sheet halfway off my body and that fixes it for me. I couldn't imagine sticking to my sheets at night. That must be horrible. I hope it gets better soon.