PTSD anxiety attacks and wearing a night guard

My dentist had me fitted for a night guard 6 months ago, because I’ve ground my teeth to the point that I have more crowns than teeth left. I also have been getting Botox as well, for a couple years, but Botox isn’t cheap and wears off. The night guard is comfortable and thin. But the problem is I have PTSD and high anxiety. I’m in treatment. Thank goodness! So, even now, wearing the night guard triggers my anxiety at night. I have full blown attacks wearing the night guard. I haven’t slept well in a month. I committed to trying harder to wear it nightly after my dentist visit last month. I stay awake for hours, my heart is pounding, hard to catch my breath, instead of sleeping. have tried propping myself up, sleeping on the couch, wearing the guard during the day to get used to it. But, wearing it during the day, I’m fine. It is comfortable and I forget it’s in my mouth. I’m at a loss on what to do. I know that I need to wear it, while sleeping, to protect my teeth. My psychologist said it’s going to take a lot of time. My dentist doesn’t understand the issue. Anyone else, who has/had PTSD and anxiety, have issues with their night guard? Just wondering, as I’ve googled this and found nothing.