period??

Me and my boyfriend were have sex pretty consecutively in a 24 hour period. He did finish inside me 3 times🤭🤭 i decided to take a plan b next day and then i realized i was 2 days away from ovulation. I had a “period” but it came a week and a half early and only lasted two days. It started of as really light pink mixed with CM, then it got bright red and was like a medium-light flow the next day and then it just stopped. Is it the plan b that caused the bleeding or should i take a test soon?