Bleeding during/after sex

So me(19) and my boyfriend(22) got together about 3 months ago. Ans the first time we had sex I bleed a little bit. (Light pink to medium pink) and I was fine after that. I figured it was because I had not had sex in a very long time before that (about 4-5 months before) then we had sec a few times after with in 3 weeks and no blood those times. So just about all of November and most of December up until tonight we haven’t had sex.

So here’s a few things

-wasn’t protected

- not on birth control

-he said he’s pretty sure there was precum (he’s honest with me about this Bc I get sketchy and I asked when was the last time he had cum he said a few days ago)

So I was sketched out and we went to cvs right away and got a plan b. As soon as we got to his house I had to pee ans I noticed there was a light/medium pink discharge in my underwear. Then I go back in his room and take the pill and start googling stuff and it’s all saying like “u have cancer, u have a std, u have BV, he ripped ur hyman” so is this normal from not having sec for a while, was it stressed induced? (This all happened with in an hour)