PVC followed by 4-5 fast PVCs. Freaking out!

Hello all, I'm 19M and l've been experiencing palpitations for as long as I can remember, and aside from some rough patches where they were very frequent, they don't phase me. However, about an hour ago I was just sitting still and felt the thud of a PVC, and then my heart rate shot up maybe to around 160 and they all felt like uncomfortable PVC beats. It was over as fast as it started, only expecting about 4-5 beats before my heart went back to normal.

I’ve done 2 ECGs before which both had completely normal readings, although I’m annoyed that both didn’t catch any of my irregular beats, which is why I’m unsure if I’m experiencing PVCs or PACs etc. My palpitations just feel like a double beat with a pause.

This has never happened to me before and now I'm just spiraling waiting for it to happen again. I'm prescribed 10mg propanolol on an as needed basis, and have felt normal since taking it about an hour ago after it happened. Just want any insight as to what this might be and if I should follow up with a doc? I'm thinking possibly NSVT? One thing to note is that l've tried cutting caffeine and very rarely have it, and today I accidentally forgot to order my coffee decaf, which I suspect may be the culprit. Thank you all for any advice!