More than I expected

So last week I bought a MGX and a helix, not really knowing what to expect. Just two days after receiving them, I had a session where things were really starting to take off, including involuntary contractions. The sensation was building, and it was so startling that I scared it off. Since then, I get can pretty much get the involuntaries going, but I think I am mentally expecting/forcing things to happen so that I never get to any kind of climax. Things have also been kinda weird, last night I woke up around 4am with my prostate area pestering me for attention. It was a pleasant tingle down there, and I kinda relate it to the feeling of an approaching wet dream, which may be related to the fact of abstaining from ejaculating for a few days. I couldn't go back to sleep, so I used the MGX until I had to go to work, without any major experiences. My prostate area still feels pretty tingly/energetic like it wants to go off any minute. Is any of this par for the course?