6 days late alot of confusion. Please help

I took two first response tests this morning both vvvf positives went to doctors it was negative i had some orangish pinkish blood in stretchy discharge this morning and lasted about 5 mins is it possible i just had implantation for why the test isnt picking up hcg yet ? They made an apointment for the 11th this month to retest since im late and since spotting stopped. Whats hoing on i feel pregnant but negative tests everywhere.