It seems this time of year always kicks-off a subtle yet drastic change in my thought processes and behavior, namely, I go cuckoo.

For reasons unbeknownst to me, the shorter days up here screw up some physiological process that starts in my body and brings my mind down with it. Today, the tachycardia returned and I've been borderline feverish and sweating all day despite keeping the house cold. I'm anxious, jittery, and pleasantly angry. It's awful.

I've been admitted several times for this in the past few years, always within this time period (although it's usually after the new year) and the doctors can't find anything wrong with me, but surely it can;t be psychological. My body is reacting adversely to the weather and I don't know what to do. I get really susceptible to panic as well.

This isn't SAD, or if there is a such thing as reverse SAD, there's almost no information about it at all.

Does anyone know what's happening?