I have never missed a period since my tubal, which was 5 years ago. Until this month, I started spotting one day just a little. thought I was geting ready to start. Days later nothing. After sex I had noticed that I had some bleeding, still no period. One morning I woke to severe back pain, I have never had back pain that bad. I've been craving the sweets like I always do before I start but the month is almost over and still no peiod. I woke last night to severe cramping and diarrhea. I have been having cramps on and off today.Please tell me I'm not pregnant,and if not that then what could it be? %-)