I was just wondering what's going on with me....Well I was supposed to come on my period around the 14th-15th of this month. I am NEVER late for my cycle. So today is the 25th and all that I have is terrible cramps, as I have for the past week and a half also. I've taken numerous home pregnancy test, and I even went to the doctor, and all the test are showing negative....Even when my period is switching over to another time of the month it doesn't take this long. Should I be worried?