Do I have an STD???? PLEASE HELP

So I recently got checked and everything came out negative. I then had sex with someone and it was unprotected. 3 days later I started feeling sick then the next day i was fatigued and my throat was completely swollen and my vagina was burning!!! It looked like herpes in my throat and on my vagina. it has been a week and the burning has settled but my vagina is still swollen and the discharge is yellow and very chunky. My vagina is so sore and feels like someone hit it with a sledge hammer. someone please help. I know its probably herpes but I'm hoping it's my hormones going haywire.