Std or pantyliners bump ?

Really scared I might have caught something. There's a red bump right at the opening of my vagina. It hurts when I wipe and it started bleeding and pussing a little today. Right before I got my period I was wearing pantyliners (just in case it came early) and that's when I noticed the bump. Then when I got my period I tried wearing a tampon but it rubbed the bump and it really bad so I wore a pad. Now that I'm off it feels bigger than when i first noticed it and it hurts. Can you get them from wearing pantyliners ?