1st trimester bleeding

Im 8.5 weeks. I had a little bleeding at 5 weeks and then 2 moderate gushes last week. Nothing since. I had an ultrasound at 7 weeks and baby looked great then again after the second episode of bleeding. Baby still looked good. They cant find any evidence of a subchorionic hemorrhage so we arent sure whats causing tbe bleeding. Has anyone had anything similar and what did it turn out to be?