Have any of you ever noticed running a low grade fever when it's close to that time of the month? It started two months ago, when it got close to that time of the month my temperature stayed right around 99 degrees, and I had chills. It lasted for a few days then went away. Same thing last month, higher temperature and chills. Now, it's right around 3 days away from day 30 and I started with the fever last night. I had chills and took my temperature and it was at 99.0, and it's been that way off and on all day today. Is it something I should be concerned about or could it be considered "normal"? I have no other symptoms except a bit of tiredness and stress (I get stressed out when I'm sick, and a fever stresses me out worse than almost anything else).