What Could Brown Vaginal Discharge After Using Anti-bacterial Cream Indicate?

I had a couple cervical biopsies June 20th. About 2 weeks later I got my first bacterial vag infection. I used the prescribed cream for 5 nights. Since using the cream, I've been experiencing a lot of brown thick slimy discharge. It was uterine lining in it. There is no bad smell. I am 35. Is this normal? I'm supposed to start my period next week and I'm on the pill. What is all this coming out of me???