Hang on in there @foxgem , it will pass. You will feel better soon. Tbh no one can sleep properly in this weather, we just take what we can. Here’s a tip from hot places abroad - if you have a room which gets a lot of direct sun during the day, close the curtains or blinds when the sun is at its hottest then open them and windows when it cools down int he evening. Also a wet flannel or cap completely doused in cold water on your head and neck helps keep you cool.
I’ve just spent 2 hours in my gym as its aircon makes it freezing! Even if you just walk on a treadmill you’re cooler than outside 