HELPPP!

Okay, so I’m an incredibly paranoid teen. I’m constantly worried about my health and safety and am constantly typing in my symptoms into google to see what’s wrong with me (I don’t recommend it). Anyways, recently I had another yearly reminder at school about safe sex etc. They reminded us to always check for signs of STIs and if they get worse get help. Anyways, I’ve always had weird sores in my mouth simple cause I have fat cheeks. But recently I’ve been constantly been worried that it’s hpv or warts or some crap. So I’m wondering, does anyone else have sores in their mouth??? Like is it normal?? Or should I be getting help??