sounds like you need to go ob doctor you might have polyps or fibroid tumors that caused the back cramping i would go to specialist or have cysts on ovary or endometriosis which causes severe pain or ypu have sere infection
go see your family planning clinic sounds like you could be pre menapusel
Go to a obgyn and see if your having a miscarriage. A test will normally come up negative if you already did so youd have to get an exam. Are there back pains with it? I had a miscarriage early on and they missed it for 2 months when i told them my symptoms and was already a month pregnant. May have to have an ultrasound if that would be the case to prove it unless its something else. Hope everything works out
Go to the doctors. Is there any chance you may be having a miscarriage?
Also book yourself in for a smear test :)