Spotting at 6 weeks

Kristy
This might be TMI, but Monday I had some spotting, it was just brown. So I went in for a transvaginal ultrasound that day and baby was there with a heartbeat. Since then I've still been having spotting. Today it was some red blood. Only when I wipe is when it's there. Has anyone else had this happen? I'm very worried and afraid I might have a miscarriage.