12 week bleeding

During my 12th week of pregnancy I started bleeding. Went to the er and the dr, both did ultrasounds and baby was fine. I was sent home but have still had bleeding off and on since. I am supposed to be 13 weeks today. I had to take clendamycin for 5 days vaginally for possible BV, and bleeding started the morning after last dose. Has anyone had experience with this? I feel like I’m getting nowhere. It’s so frustrating.