Implantation bleeding

Has anyone experienced heavy implantation bleeding? I had brown discharge Tuesday night which turned into what I thought was my normal period Wednesday. Thursday night it turned to a heavy bright red almost orange. This morning I woke up with nothing there.  I went to the doctor's and she said I most likely experienced implantation bleeding and she thinks I am pregnant. I thought implantation bleeding was light. Anyway I had a blood test and will get my results on Monday. Has anyone else experienced Thai type of implantation bleeding?