Hcg levels

I found out I was pregnant a week ago.

Because I have a history of ectopics I needs to have my hcg levels taken every 2 days until I am 5+ weeks or until they can see where the baby is placed. I also had a chemical pregnancy last mth, so I haven’t really had a period since the lose of the last baby. I also have short cycles so that makes it hard to work out how far along I am being my period is anywhere from 24 days -2. Anyways I had my first hcg taken 28 days after I started bleeding from the chemical and it was 81, 48 hours later it was 212 hcg so they have ruled out another chemical and have relaxed about another ectopic for now... being on Thursday I should get my ultrasound.. with any luck we will see Bub in its right place