Negative test... I’m confused

leticia • 👼🏽2017. 🌈ttc rainbow baby 2019

I’m assuming I had implantation on 9dpo

Today marks 12dpo took a random test after I downed a whole bottle of water and it was negative....

My period is suppose to come tomorrow ... I guess I’ll wait it out . I’m confused why would I be spotting . I never spotted ever in my 15 months of trying to conceive .... and ideas