My Body notices — But I dont!

Ok so I’ve been getting into prostate stimulation for about a year and a half now.
Only recently have I gotten to the point where i get “the shakes”. I’ve gotten it with an Aneros, as well as with other toys.
I actually shake pretty violently, and I’m pretty sure I had a full body orgasm at one point.
I say “pretty sure”, because i started shaking more and more, until I shook really violently and then it kind of subsided.
The problem is, I didn’t feel any pleasure!
It was like my body was moving ahead of me and having a grand old time, but my brain didn’t send out any pleasure stimulants.
Does anyone recognize this, and what do you suggest I do? I’m worried my prostate is “broken” in the way where I don’t feel the pleasure everyone else is feeling. Or maybe I’m just impatient/not relaxed enough/not focusing on the right thing?I’d appreciate any advice!