Bleeding During Early Pregnancy?

Victoria

Hi all. I am 6 weeks pregnant and recently got a transvaginal ultrasound this past Friday. The following 2 days (Sat& Sun) I started spotting with pink and dark brown blood. Then this morning (Monday) I began to wipe dark red blood. The bleeding lasted for about 6 hours and now it is starting to subside. I haven’t saturated my pad, instead the bleeding happens when I wipe. Has anyone experienced this or know what it may be? My doctor said to keep an eye on it and to come in for my second ultrasound in a couple days. Thank you!!