ER visit

Courtnret
Went to the ER today because of some twinge pain and when I had my appointment last I was five weeks and six days. We seen the yolk sac inside of the gestational sac, but no heartbeat. 
Today at the ER they did an ultrasound and they seen a baby with a heartbeat, but I'm measuring six weeks and one day pregnant. My appointment was Monday when I was five weeks and six days, so based on that I should be six weeks and 4 days pregnant. Should I be concerned?
On Monday my levels were 24, 928 and today they're 80,416.