Losing Sleep; Getting Heat

Damn it this sucks; I couldn't really get enough deep sleep these last 2 nights, since my body is overheating again from allergies. I took the risk and ate more canned sausages again on Friday (now Sunday for me) to confirm if the 1st time my body reacted negatively was a fluke. And I guess sausages, or rather what's in them like specific biological components or artificial preservatives, are causing it; however, today the lower half of my body stopped overheating during the night, and my upper half is cooler now. I know I should book an appointment with the allergist the hospital referred me to like 2 weeks ago, but I'm just lazy and forgetful, and I wanted to do some science beforehand.