What did I just feel?

So I just bought my first prostate toy (helix syn), and decided to give it a go tonight. I popped it in, spent a good 10 minutes just getting used to how it felt inside me, and then started messing around with small kegals while listening to some r/gonewildaudio. Probably about 15 minutes later, while I was experimenting with some rapid, 30% strength kegals, I started feeling this wave of… heat? It started in my prostate, and each time I contracted, it radiated further up into my chest through my shoulders. It felt pretty good, but also like it was building up to something bigger, and I think I got too excited and focused too hard, because it was gone around 30 seconds later.

Anyone know if this sounds like any of the big milestones I should be hitting? For the rest of my session I think I was too focused on getting back to that point, so nothing really happened, but I’m definitely excited to try again tomorrow!