Spotting... and then bleeding

So today, I noticed around lunch time I had a light pink spotting, I was assuming I’m 6wks so I thought maybe that was normal. I then noticed I started having more blood, have not had any cramping whatsoever. Called OB and was told to come. U/S showed that I was around 4wks. There was a little “blob” in the sac so I felt relief. They drew hormone levels and hcg levels. This is my first pregnancy and I’m trying so hard to “relax” until Monday. Has anyone else had any of these symptoms and it not result into miscarriage!? Low prog levels, and the probability of recovering back to a health pregnancy!?