Pregnancy after loss

I had a early MC last month. Last week, I went in for a yearly and they did blood work including HCG. Well when I got my results back it was at 32 (positive). (It’s not left over HCG from my last pregnancy as it was confirmed I was at 1 at the hospital). Well it’s been hardly rising. Monday- 32 Wednesday-46 and Friday-66. So it is rising, just not like it should be! My tests have been getting a little darker. But is this normal? I have to wait till Monday to hear anything back but I just want some reassurance. The first picture was from Thursday and the second was from today- Saturday.