Hi Stevie,
I agree with the responses above. And I’m sorry that the experience with your provider was painful.
If you are motivated to progress, it may be helpful to to try some mindfulness. Generally, this is an awareness that literally every moment – and therefore, every experience – is different than any other. More specifically, you can use mindfulness to treat your next dilation session as something completely new – because, well, it is! And that’s good news, because YOU get decide literally everything: setting, lighting, calming music or ambient sounds, a guilty pleasure tv show, someone to talk to in the room (or on the other side of the door), the timing of insertion and lots of lube. It may take several tries to successfully insert the dilator, but THAT’S OK!!! Take your time, and make the experience your own.
Let me know if you need more suggestions, and thanks for having the courage to share your experience with us!