Breakthrough

So today I decided so have another chilled session, put it in and did some light contractions.
Eventually built up to the eternal wave which is lesson 3 on mindgasm which I enjoy as it gets involuntarys going.

I started to feel the building up like my prostate was buzzing and tingly I couldn’t catch my breath and my legs were shaking, I couldn’t relax my body and I have no idea if I had an orgasm or p gasm but it felt strong and intense, felt like if I was relaxed I would lose it though, so I couldn’t enjoy it to the max, any tips or advice?

Also then I trained legs later in the day at the gym, and I was having involuntarys after heavy sets which was a little annoying. Also now and again I get like little pulses from my prostate is this normal?
Thanks