Christina, sorry to hear about how it is worse for you in summer.

I did talk to my T about it recently, not before, because there was just way too much other stuff to talk about.

It appears it started when I was about 12 although there were indications of other self care issues prior. It seems to reside with a 'teen part' as well as other issues, like being by self, nervousness, inactivity, depressed state etc but still working on it and along with everything else.