Bleeding for 12 days PLEASE HELP

Hi everyone I need some help desperately. I believe i got a positive OPK on 2/6 so I ovulated on 2/7, I had sex around that day and on that day.

Fast forward to 2/12 I had very faint bleeding starting that day and have had that every day since and super mild cramps in the morning till about noon. I only had to wear a panty liner (one of the thin small ones) on 2/18-2/20 and even then it took awhile to be enough - I only changed it because I felt like it was necessary.

My OBGYN did a blood test on 2/15- came back negative. I haven’t taken any other test since then.

They told me not to worry about the bleeding till it continued to this week - I reached out today but haven’t heard back.

I typically have regular periods - they are a 30 day cycle and last 3 days.

I am looking for any help from anyone who may have experienced this before please