I started to get signs of an early pregnancy, then I had extreme cramping and I had what I thought was a period, but it stopped. My period wasn't due for another week when it happened. It was different to a period though, it seemed to have clots and it came after a milder cramp than I had been having. The next day i went to the doctor and he did a urine pregnancy test and it came up negative. I thought I must have just been sick, but part of me has a feeling that I was pregnant for the short time, could it have been an early miscarriage or was i just sick?