Dr confusion/frustration

So I'm only 6w+6 and starting to get a little flustered with things. I went for my initial appt yesterday. They sent me for blood work. I was told results should be in today. So I called and was told the results that were in.

Here's my issue: so I was told at the appt that I will only have 1 ultrasound my entire pregnancy unless something comes up to warrant another. The standard blood work that they do doesn't measure hcg levels. So I'm truly confused as to how they are monitoring that everything is ok. To add frustration, I suffer from intense anxiety and I'm not allowed to be on me meds. Thoughts/advice please?