Implantion bleeding or period ?

I’m supposed to start in 4 days the very last time I had sex, which was on the 11th I believe, my boyfriend decided to cum inside of me... anyways I wiped & seen this right now then wiped again & got a more bright red but not a lot , could this be implantation bleeding or just the start of my period ? I’m open to the fact of being pregnant but I just wanted to know if you lovely ladies think I should test or not ? 😊