Miscarriage vs chemical pregnancy

Melissa

I know I should understand this, but I’m still confused! Can anyone tell me what the difference between a chemical pregnancy and an early miscarriage. In October I got a positive pregnancy test(day of my missed period) one day later I started bleeding. My hcg levels went up but didn’t double (my doctor wanted me to get bloodwork until my levels were a zero which took 4 weeks)..

Thanks!