What Causes Heavy Vaginal Bleeding And Nausea After An Endometrial Biopsy?

I had an endometrial biopsy last Wednesday. My doctor gave me no instructions, but said I would experience spotting. I m bleeding heavily instead and I m nauseous. I m going on five days and I m concerned because I had sex, and two days after the procedure--assuming I had started my period as it was due around the time of the procedure--used a tampon. I also maintained my usual exercise routine--running, spinning. Clearly, I should have been told not to have sex, exercise or use a tampon. I feel very off right now. Is this normal? I d call my doctor but with the holiday, the office is close. Thanks for your time.