I was suppose to have my menstrual cycle August 10,2010. Well now it's August 17,2010. I have had 6 pregnancy tests and all of them said I was pregnant. I went to the doctor (OB-GYN) and my doctor says I am 4wks pregnant. I am having lower back and lower abdominal pains. They kinda feel like the cramps I get when I start my menstrual cyle. I have had these cramps off and on ever since August 12,2010. They come and go. They are not constantly there. So, I mean is this normal? Or should I be worried? I saw my doctor Yesterday (August 17,2010) and I told her about the cramps but I guess she didn't hear me cause all she was smiled. Please let me know what you think.