help!:\

I am 9 days late never ever am I late. I know a lot of people say that but I can tell you the exact day I'm gonna start. I took FRER hpt Friday Saturday n Sunday n today. they were all positive. went to Dr today n hers was negative. but she said if I'm only 3\4 weeks it won't show on hers she done blood should be back tomorrow. anyone else experience this? I got so depressed because hers was Neg.