Paranoid after hookup

I had protected sex last Saturday. It was with a dude I just met and didn't ask him if he was clean. We used a latex condom and it wasn't the greatest and I wasn't super into it but it was over fast. A few days ago I started getting what I thought was a yeast infection but started thinking what if he had genital herpes or another STD? I've been all over Google. There's no bumps or sores but my whole vagina feels swollen and irritated and itchy. The whole thing is red as well. Thoughts?

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