I've never had a cat in heat so I don't have any advice for you.

I have had a kitty to keep me up for about a week straight (when we first got Brodie) and I know that you feel miserable!

You have to get some sleep . . . I wish I knew what to tell you . . . could you possibly move her into another room at night with all her stuff (bed, litter, food, water)??? Like maybe a bathroom? I know she won't like it but that's what we had to do with Brodie & I slept sooooooooooooo good once he moved into the bathroom!!!

After the introductions, he stays in his own room with Josie. Just works out better for us that way.

Good luck.

BTW, don't you have to wait until the heat is over before you can get her fixed? I assume that's why you're waiting.