How long after a chemical pregnancy can a dr. diagnose it?

Va

I believe I had a chemical pregnancy. Got a vfl 11dpo pm & by 12dpo am, the line was gone & I had dark dark brown spotting. Then today, 13dpo, the line was still gone & my period started.

I called my drs office 12dpo but they were closed for the weekend. If they do blood work tomorrow (14dpo) will they still be able to diagnose a chemical & what tests besides a blood test would they do?

Thank you in advance for your answers!!!