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the last time i had my period was june, i remember ending it like june 23rd. i never got my period for july or august and now september. since my first missed period ive taken like 8 tests and theyre all negative, i even went to the doctor and it came up negative. my breasts arent sore or anything and they dont seem any bigger, i do get alot of throbbing and pains in my lower stomach like where my ovaries would be and im constantly craving every food i think of, i get headaches & heartburn alot more lately and i feel so tired and like blah all the time, sometimes i think my lower stomach is hard too but then again it might just be in my head. any help??