Worried...

It's not very often but every now and then I will have little cramps but sharp pains in my vagina and I don't know what they're from. I'm a virgin so no sex/pregnancy and it doesn't happen when I'm on my period so not period cramps... i haven't done anything different than my usual lifestyle yet they came out of nowhere. Does this happen to anyone else and do you know what it's from?? If it keeps happening I will go see a doctor but I wanted to know if anyone else experienced this