I think I might be pregnant but Im on my period but its a period I never had before. I ll bleed for a couple hours then stop , then it ll be light and then it ll be heavy . I have sore nipples , I have hot flashes ,my lower back aches , im peeing what feels every 10 minutes , i have lower stomach cramps every now and then too. I took four tests but all came back negative. Is it possible that I am pregnant or is it just in my head