Ruby Jane -
I'm so sorry to hear that you are having panic attacks. It is great that you have someone to talk with, and that they have a course of medication for you. I understand how you don't want to have to do it long term, but think of it as a helper for the short term.
I definitely am not a doctor so please always go to your psychiatrist first for the main advice, but in my experience it really helps to have a "safe place" to retreat to in times of stress. Even if it's just one room, or a corner of a room. Maybe you put on headphones and listen to a specific playlist that soothes you. You close your eyes and put on lavender fragrance, again something that soothes you.
Do you have an "escape plan" like that, to let your body have time to relax?