Did you do a urine test at the drs office? or any tests?
I know that I had a positive digital test and then my drs appointment was 2 days later and I tested negative at the office. My dr said i was having a miscarriage and I started to bleed pretty much as soon as i left her office. If you haven't had anything in a week I would call the office back and say you still have nothing so they can take the best steps for you.
The Dr. would need to tell you why they think you had a M/C. and if you were to take another test then yes the hormones would be rising and it would likely read that you were further along assuming you have not M/C.
Have you had any bleeding? Why would the doctor think you have miscarried? He would need to do an ultrasound to check.
If you have miscarried but just not passed the baby yet then hormone levels can still rise - just not as quick as they would in a viable pregnancy. So you need to see your doctor again.