I've been experiencing on and off headaches the past couple of weeks. I don't have much of an appetite. This morning was horrible! I woke up nauseated, lightheaded, more tired than usual, my temperature was up(low grade fever) and pain in my right lower abdomen. I'm confused because they seem so close to pms symptoms. I'm supposed to get my cycle tomorrow. I took a HPT this morning and it said negative. I'm really not sure what to think at this point but I literally feel like crap... Plz help!