Hi! My (heavy) menses started yesterday, and they have been accompanied by chills and slight tiredness. I've never had chills before, but sometimes I do have been tired during my periods. The chills are more intense whenever I move and when something touches my skin. I also nearly fainted earlier today - I was just walking slowly in a room with poor air conditioning, and suddenly I felt dizzy and I felt I was going to fall down on the floor. I'm a 21-year old woman, I weigh about 130 lbs and I'm about 5 feet and 6 inches tall.