Normal hcg levels?

Hey everyone. I'm 4 weeks pregnant today and had my second blood draw this morning. I'm so scared about the results. I had my first blood draw Thursday 8/8 and they came back at 63. I would guess about 12 dpo. I have to wait until monday to find out if they're rising quickly enough and I had a miscarriage in May so I'm kinda freaking out.

The nurse I spoke to originally said the number was low, but then said it's ok since I'm so early. I took a pregnancy test thursday morning and one this morning. It got darker, but not much. Does anyone have any idea what I should be expecting? I just want to be ready.