Am I having a misscarrige ? HELP

Cassie
So I went to the doc Monday I supposed to be 8 week 1 day but by scan read 6 w 1d with no heart beat . However I went to the ER the next day to confirm and still no heartbeat but my HCG levels were 6,000 isn't that high ?? Even for 6 week ? If I am 6 weeks which I honestly believe I am 8 because I remember my lmp ! 
​PLEASE SOMEONE HELP THEY PERSCRIBED ME THE MEDS TO MAKE THE BLEEDING START AND HAVE THE SAC PASS . 
​What should I think ? Does anyone has a similar story I really am losing my mind