Im on my period , but ive been having hot flashes random headaches and cant eat anything with out feeling sick.

DUB?: It's possible you are having irregular bleeding, called dysfunctional uterine bleeding (DUB), rather than a period. With DUB, high levels of estrogen can cause your symptoms, & also mood swings, bloating & more. If you have had unprotected intercourse, you also have to think of bleeding during pregnancy. Take a pregnancy test, and see your physician if symptoms continue. Hope that helps.