Since there is no way to know when you implant, it’s best to wait until 14dpo. You can implant 5-12 dpo, but 7-10 is average. It takes 48 hrs after implantation to get a positive on a sensitive test. If you don’t mind paying for more tests and seeing potential false negatives, you can start testing 9dpo. To me, seeing the multiple negatives is harder on me.

I’ve read 2-4 days