I have been taking gildess fe 1-20 for almost 4 months well being on the pill I have had irregular periods and before taking the pill I was regular well I was on antibiotics twice for a infection im on my last inactive pill and I just spotted brown for a day and a half no period I took a pg about almost a week ago was negative I am sexualy active I don't know what to do I get headaches I'm craving food could I be pregnant? Please help