Thong gone wrong

Ok so I put on a thing it’s lace I literally only had it on for 30-45 mins .... now my vagina itches and burns to the touch now sex is even painful only T the entrance do I have a thing burn ? Sheesh mY e I had it up there too tight this never happened before has this happened to anyone ? Yes I wear thongs but maybe 1 per month it’s really just so my BF can take them off LET ME KNOW