Hi, @Brioski. So sorry you are having a tough day. I don’t have any advice for anxiety attacks (would use the tools your doc suggests and follow the tips from folks here with firsthand experience).
But I can say that in the first while after I quit, my breathing felt extremely strange at times. Sort of floaty, like I was taking in O2 but it was not “gripping” somehow. I believe it had something to do with the fact that I was a heavy menthol smoker. It took me a while to recalibrate to breathing without the pinchy feeling from smoke, menthol and chemicals. I had to get reacquainted with clean chemical-free oxygen.
This weird feeling got better. But during the transition, I appreciated aromatherapy inhalers and diffusers. Different essential oils have different properties and appeal to different people. But for what it’s worth, I found rose, grapefruit and sweet birch (wintergreen) scents to be helpful during the early weeks of my quit. Lavender, rosemary and jasmine also.
In any case, I’m wishing you ease and a good night’s sleep. Take care.