random bump by clit?!?

Katelyn • I take pride in my confidence
Okay so my boyfriend and I were having sex and I noticed this bubble/bump by my clit that just showed up out of no where, it's not visible and it barely hurts when I poke and squeeze it. I'm a 15 year old girl if that helps any type of explanation but I'm super nervous and worried. It's like underneath the skin! Please help