For the past three months, I have had weird periods, or so I think they were periods. One month I spotted for three days, then that was it, the second month, it seemed normal and lasted five days and now, Ive been spotting again. Ive also been tired and nauseous on and off,cramping, but not like period cramps. My husband and I are trying to conceive. Im not sure if anyone has experienced anything like this and was wondering if I could be pregnant. I have taken a pregnancy test and it was negative.