Faint bfp 10dpiui, 12dp 10,000 hcg trigger, what do you think?

I had the hcg injection a week ago friday and tested this am and got bfn - so I am not sure if the hormone would still be in your system - the levels fall every 36 hours - so I would retest again in a day or two just to make sure it is an actual pregnancy. Good luck to you I hope it comes out pos