New User ~2 weeks - Intense sensations day after session, none during session?

Hello,

I'm new to the whole anal region, and I've been reading the wiki religiously.

After a few days, I've learned during my sessions to really contract very lightly.
It's pleasant by otherwise rather muted.
I can feel the aneros helix syn trident "buzzing" and making motions.
Really it does all the work and contractions can easily kill the sensation.

However, the days after have become insane.
The first time this happen I sat down in my office chair for work -- no aneros inserted.
I felt very very intense buzzing on all my anal bits.
Then at some point in the day, I repeatedly felt massive sensations growing in my prostate, and when I concentrated on them they would explode into waves across my body.
I think at one point I just had to lay down, and then these explosions started to bloom put of eachother into waves a cross my body.
They had a cadence and would fall back to the buzzing.
Sometimes the feeling would be even larger it felt like my whole anal area was building energy and sending a massive wave.

I think I maybe had a mini orgasm at one point.
Where I felt the need to clench spontaneous to brace for a "multi-wave", however I feel like it never "peaked" or I could have made it larger with more focus.

Needless to say I was very excited to put in the Aneros, but once I dude I could no longer feel anywhere near the sensation from my prostate.
Only the pleasant buzz of the Aneros on the area. With no build up of sensation or buzzing in the whole anal area.
When I took the Aneros out it came back. It's as if the Aneros has awakened that area but the massager itself makes the sensations unfocused.

Is this a normal part of the re-wiring process? Or does this indicate something else?