STI SCARE

I drunkenly had unprotected sex on 4/25 and the next day found out the guy is very promiscuous. Since then I’ve had some vaginal itch but nothing painful and clear discharge. I’ve never had an sti or std so I’m very worried that I might have caught something or I’ve tripped myself into thinking I have one. Is it too soon to test and get accurate results? What are the most prominent things I should look for as symptoms?