Measuring slow

Raven

I had pink and brown spotting last night, that increased (not enough to fill a pad and no cramping), so I went to the ER. I was supposed to be 6w1d and through a vaginal ultrasound they said I measured 5ish weeks and my HCG level was 650. They found the sac and a fetal pole. I go back next week to check HCG levels again. Has anyone else had this and had a positive outcome? I’m trying not to stress