why am I bleeding after sex?

I need an answer and no I can’t go to the doctor, my and my bf (I’m not gonna say any private information) we started having sex a couple weeks ago, it was both of our first time and the first time we made sure we were safe and we went slow, yea I did hurt but I didn’t bleed, we did it a couple times that day but that’s just because we are horny, a couple days after we did it I got my period, and it ended 4-5 days ago, we normally we decided to do it again (also protected) and and last night when I got home I realized I started bleeding a little bit like spotting, forwards to today morning it hasn’t stopped, it’s not like a period but I’ve never spotting like this like ever anyways I don’t know what to do, i doubt it’s my period again my periods aren’t like that and I can’t go to the doctor cuz I would need my parents for that or an adult and I can’t tell anyways I had sex with my boyfriend they’ll freak out and im nervous. I even took a mirror and looked down there to see if I had a cut or something because its not the first time im bleeding, he has pooped my Cherry and it has bleed, and there is also one time he cut me in accident with his nail while he was fingering me. But idk what it is. And since it was both of your first time we didn’t give each tiger STDS or anything like that