Not sure what I experienced

Helix Syn owner for 2 months. Every session I can't get up to what I think are p-waves , most I can get are the involuntary spaz.

Last night I accidently knocked out during a session. I woke up with toy inside and clenched abit. It felt really good. Like the p-tab was in right place and the inside was hitting the right spot. I kept exploring and could get my body feel very pleasured. As I clenched I could basically start fucking myself with the toy going in and out and the feeling would increase then diminish. Couple minutes later I can do it again for a total of 3 times.

I'm not sure what I achieved and having difficulty reproducing. Any advice would help.