URGENT HELP PLEASE, seeing doctor on Monday 😩

Last weekend I made the stupid mistake of sleeping with someone, was very drunk and a major regret no condom was used 😩😩 so that was Sunday, Monday I got my period nothing out of the usual expected come Wednesday Thursday it stops pretty normal. Now Friday and my hole is red and burning and the bit below it with white discharge, has this happened to anyone else and haven’t gotten and stds/stis, I’m freaking out to the max, I’m only young (23) and feel like my life’s gonna be over, please help 😢

UPDATE

thanks for you responses ladies, I’ve been using a thrush cream the last couple days and it’s settled down a lot, still going to the doctor on Monday to get checked for everything. Thank you thank you thank you ☺️