My discharge looks like dandruff (but blood colored)

Hello,

I have been on and off ortho tri cyclin,
and i was on it for 2 months last time, took a month off
and started this month again. I was diagnosed with BV,
so I used the gel (metranazole or something i dont have the name on me right now) for 5 days. I was fine , but about a week later, when I wiped after peeing, I saw some brown stuff... like really brown, I coudlnt even imagine that it was blood. I thought it was from my butt (but it is odorless). At first it was just a little bit, I only noticed when I wiped myself, but a couple of days later, it was like a heavy brown discharge. I went to my gyno, and she told me not to worry about it and come back a little later. Then my period started 5 days earlier than it is supposed to (i m on birth control pills now, and I havnet started my last 7 pills), and it is almost gone, but sometimes I see those dandruff looking blood clots in the toilet. Sometimes i wonder if my uterus cells all shedding or something. But I don't really have a pain, burning no nothing I am really fine. I had a bit of cramp when I had a period, but it wasnt a heavy period either. Can someone please tell me what is going on? I would really appreciate it. Me and my boyfriend also dont have any STDs.

Thank you!