Heat and sun problems, fear of summer:(

Dears,
I would please welcome your suggestions for inability to manage sun and heat, which started after birth of my son 3 years ago after persistent emotional issues with my family, my parents.
It's like I was never able to let the anger and sorrow go away, I kept on recording the bad situations and the emotions still were (are) in me, causing me pain over and over-- so it is with heat- it stays in my body and does not go away. I do not sweat almost at all. My husband sits in hot car, or is on sun, and his back is wet in few minutes, while I stay dry, and I start to feel dull feeling in my head, which is also on touch very hot from upper hairy part and I feel how the heat stays in it and does not leaves my body by perspiration or other natural way.
When my son was born, I spent whole summer hiding from sun, because only few minutes on sun brought me terrible headache. I diagnosted myself correctly with hyperthyreosis, which was confirmed by blood tests, but anyway no treatment offered. Later, the tests went back to my normal, i.e. mild hypothyreosis, but my symptoms from sun and heat remained unchanged.
Second summer was the same.
Third maybe little bit better, but no good at all.
This shall be the forth summer. I used to love sun and heat couple years ago. Summer was always my favourite season. Now I am like Dracula on hot or even warm days, and even sitting inside today, I react to heat outside (33 c in shadow today) by dull feeling, sadness and headache :(
I know for sure that my not working heat management is connected with my not working emotions management. I can not cry enough to cry my pains out. I keep the emotions in and I wish to put them out, but my body cannot.
Oh, the only thing that helps me handling the heat and sun is water, cold water. Could I spend my summer with my head sinking in the sea or lake all day, I' d be fine. But I cannot. And last year, even 5 minutes from my head got out of lake (on our holiday), I was starting to feel that feeling of overheating in my head again.
Please could you share your ideas on how to solve this.
Thank you with all my heart.
Adriana