Did this happen to anyone else?

Angel

I had blood work done at 3w4d, the day i found out i was pregnant. My hcg came back as a 15. They ran it again at 3w6d, and it went to a 58. They called me this morning(4w4d) to say they want to repeat blood work before scheduling an ultrasound and want to see my hcg at least at a 2500. I just want to know if this happened to anyone else and what the outcome was?