Confused

Daphne
I had a D&C on July 12 and have been visiting my doctor each week to make sure my hcg levels go down. To add, I'm back on birth control. I got my first cycle on August 11 and a few days before, my hcg level was 60. I personally figured I was already down to 0 when AF came. I did blood work on Monday as part of process even after mentioning my cycle has started again. A few days ago, I begin to spot and read that it's normal although I'm on second month and second week of birth control. I receive my results for my hcg and it's a 7 and I'm not sure I understand since it's under postmenopausal. Any help is greatly appreciated, thank you.