still bleeding

Shy
So, this is my 3rd round of provera/ clomid. This round I took 100mg of Clomid. Well, I took provera for 10 days and then about 4 days later started spotting. I have been told to count  spotting as CD1. I went on to take my clomid as instructed. I am now on CD20 and I am still bleeding. Not a lot...but still bleeding. I am going to the doctor tomorrow but I was wondering if this had happened to anyone else? I'm pretty nervous and scared.