Hot flashes when you've reached your limit?

Hi, I'm 19, and I've been ill since 8. When I was 14 I became severe, and since then the way my body seems to tell me that it's had enough and that I've reached my limit by giving me a really uncomfortable hot flash. I also find that the hot weather seems to speed up that process, so I then reach the overheating stage faster than I do in the colder months.

I just really want to know if any one else gets the hot flashes, for the same reason?