Idk if I have a fever but I got home started to relax and all of the sudden I feel hot to the tough but I'm really cold…

Idk if I have a fever but I got home started to relax and all of the sudden I feel hot to the tough but I'm really cold as hell not even a blanket helps had the chills and sort of achy and now a slight headache I don't pump milk on Mondays at school because on Mondays they don't provide a room I'm comfortable to pump in just on those days,could that be the problem? when I got home I was very engorged but I'm not anymore also my son hasn't been nursing as much do to feeling sick from hits shots Saturday and a stuff nose , (cleaned it out) help?