Hi, I've been getting those sympthoms for several years already (I'm 20 now).
I do not tolerate heat. I mean even now (in spring in Lithuania) being in a trolley is way too hot for me (although I wear T-shirt and it's only 18 degrees by celcium). I start feeling like I'm going to run out the trolley screaming and ripping my clothes off.
The other thing I can't tolerate is carbon monoxide and other gas exhausted from car's (especially when there's something wrong with cars engine and diesel is not fully burned).
Another factor is quite unusual. Everytime I'm sitting in my father's car and sun is shining, I become dizzy and generally feeling unwell.
If either of those factors affect me for a while I get headaches which are extremely bad sometimes (I have even cried because of them twice). A pill of Ibuprofen 400 removes the pain.
I sweat a lot. Even at winter time when it's about -10 outdoors and I wear an unbuttoned jacked, my shirt is soaked by sweat :/
(I'm sorry for such expressions, I'm not an English speaker actually :/)
The other thing I have noticed is mitriasis. Although a room I live in is bright enough, my eyes look like I was on drugs (narcotics) :/
What could cause all this?
I'm sorry if I couldn't express myself in the way you'd understand :/ just tell which part is not understandable :)