I need promising stories, bleeding at 6 week pregnancy

I have had 3 MM before starting IVF, our first transfer was a failure. The second transfer I got beta & 9-12 day hcg beta were good. I have my first ultrasound for week 6 on Monday ( in 3 days), but woke up at 6 am by some pain at my vaginal area, went to restroom & saw brown spots on my underwear, but while wiping i see light red/ pink spotting. I lost hopes ….. this one was a normal tested embryo. Can not stop crying, does not want to go under MM & all of those terrible feelings.