first of all I haven't had a period for almost 11mnths after a sever case of menstrual bleeding which ended with a blood transfusion. Anyways for the last three days I have been urinating at least three to four times an hour I feel like something is sitting on my bladder. Then I have been extremely tired 8 hours just does not cut it. Finally I get nauseas and my lower back hurts. I took a pregnancy test but it is negative what should I do