First appt? HCG levels?

Hey ladies so I will be 4 weeks as of tomorrow and I made my first appt today. I wasn't able to get an appointment until October30!!! I tested last week at 11dpo and the test measured me 2-3 weeks. I plan to test again. Seems like forever to wait for a doctors visit especially since it seems a lot of you ladies have already went. I'm due May24 this is my first pregnancy. How does everyone know their hcg levels? Should I try to go sooner?