trying to figure out how far along I am.

so my LMP was may 6th. I'm on a 37 day cycle so my OB thinks I ovulate late. I found out I was preg June 24th I was 2 weeks late when I found out. I went got a doc app June 28th they did an US and saw nothing she said well hun I think your just to early. So I had a blood test June 28th then again 30th. June 28th levels were 455 then went to 800s so they doubled. then I had another test July 3rd levels were in the 2,000s almost 3,000 then had a test monday and levels were 18,000s. when my levels were in the 400s my OB said I was like 2 weeks. But theres this so idk