How soon is too soon?

Had negative blood tests on Monday the 9th at 8 days late. Still haven’t started as of tonight (11 days late).. & Today I think I got a faint positive, but how soon should I go get blood work to be sure if I’m pregnant? I just had it on Monday and didn’t know how long in advance the blood tests could show and when I should get retested? Thanks!

I’m also going to post my faint test. It may be negative but I feel like I see a line starting so I’m crossing my fingers. Give me your advice!

That’s the original, and below are some edits 😊