Hi So , Im 17 And My Boyfriend Has Been

Hi so , im 17 and my boyfriend has been cumming inside of me.. I havent had my period since october and my period comes when ever. Its irregular. But on the 18.10 days after i had sex i started to what i think implantation bleeding . it was a light pink. It sometimes would get a pinkish red color sometimes a brown.. But i stopped spotting today, and decided to take a test but came up negative, was it to soon? Do you think i can be pregnant??