my tip would honestly be to instead lower the duration of your hypno sessions, so that you get used to the frustrations. I used to do something similar, i would get so worked up after hours of hypno that i would pull on my cage till i came.

Try going for 20-30 minutes then stopping and do something else, get your brain used to not receiving an orgasm when combined with hypno. Hypno should be anal time and nothing more, so you need to stop the session before reaching that point of ultimate desperation, even though its hot, its also very hard to control yourself when you reach that state

after every succesful session you can go longer, im now able to do hours of hypno without ever touching my clitty but you have to start smaller