AIO after my first cruising encounter?

Throwaway account!

So at a bus terminal this weekend I had my first cruising encounter (if it even counts as that). I'm a gay man (26). I was washing my hands in the bathroom and noticed this guy checking me out (late 20s?). I was super nervous because I didn't wanna misinterpret his glances for something else but he moved into a stall and waved me to come over. I did but was shaking. I've never done anything like this before and the thought of getting caught freaked me out but it was exciting as well.

Anyway... I entered the stall and we kissed. He then pulled my pants down and gave me a bj, though I wouldn't count it as one because it lasted 30 seconds at most and I couldn't even get hard from the nerves. I did the same–an even briefest one–and we kissed again for a second. Suddenly it was too much for me so I stopped it and left. I'd say the whole thing lasted for 2 minutes at most.

My reason for posting here is because I'm freaking out about catching an std or something else so guess I'd love to hear what you guys think or if you have experiences with this. Our dicks didn't touch and I didn't see, feel or smelled anything funky. He did ejaculate in that short amount of time believe it or not, but it went straight into the toilet, never touched me. I'm also on PrEP.

TBH I don't think I'll ever do this again. The way this experience is stressing out is not worth it. I'm obviously getting tested soon but I see most std/sti take days or weeks to show so trying to get some peace of mind in the meantime. Any help is highly appreciated! Do you think I should just relax or could this super brief encounter lead to something?