I don't have ADHD or meds and had same through menopause and still have over 2 decades later ... so I would guess OTD (Old Timer's Disease) is the problem ... sorry that's something have to live with :)
And even in summer sometimes I need heater on to take chill off room (like now), then A/C or fan on later :)
And I well never understand why I'm cold in 18c degrees in winter but enjoy 18c degrees in summer :)