Question: how far long would I be?

I just found out I’m pregnant but I can’t get in too see my OBGYN until March 16th. They said I would have to be at least 8 weeks, which makes perfect sense. I’m just sooo impatient!!

My last period was January 20th.

It was normal and lasted 3 days.

I ovulated on the 28th.

Got my first positive pregnancy test on 2/9. It was a clear positive too! 🤩

Af is supposed to show tomorrow 2/14

I guess I’m just confused on how I would calculate how far long I would be based on that?