So, during my period I ALWAYS seem to get sick. It's never anything serious, usually just a cold or sinus infection and I do tend to run a low-grade fever, usually around 100-101. I actually have one now. Has this ever happened to anyone else? Oh, and before you say anything, yes I KNOW periods don't actually cause fevers. Regardless, I DO tend to get sick and have a fever as a result during my periods.