I was having some pain so went to the ER and they measured me at 5 weeks 5 days (back on Sunday)

I thought I was 6 weeks and something, is it normal to be off?

My HCG was 9,213. The heartbeat as shown below was 92, which some google sites say Is fine and others say it low so now I’m paranoid until my next ultrasound(next Thursday)

I know I probably am worried over nothing but This is my first confirmed pregnancy (I do believe I’ve had two miscarriages in the past but not confirmed) so everything makes me worried lol!