Just wanted to say well done for not taking any medication for the first 12 years of your anxiety / panic! That in itself is quite something as most people are only too quick to go down the medication route, myself included lol!
Think what others have said is really good advice about the flying issue. See if your doc will give you a one off dose of something to help settle you on the aeroplane. I also find that bringing your own headphones with music you find relaxing to be a big help and sitting in an aisle seat may help you to feel less panicky.
Im confident that you will find excellent support on this site and everyone is always happy to chat, listen and give great advice.
Take Care
L x