Intense Shaking and Pleasure

I recently got a aneros Trident model. I have been testing it out for the past few days. I have been starting my sessions slow and it feels great. What feels best for me (so far) is quick, tight clenches in rapid succession. My heart rate increases and my whole body twitches. But there seems to be no “release.”

Although the twitching around my body feels good, it is hard to control and makes it harder to keep clenching. I am wondering if anyone has experienced a similar thing or would have any advice?

Much appreciated.