I know what this feels like, i've gone down that road several times before, i would be in panic mode crying and hyperventilating because i was so scared i did get some advice though that has actually been really helpful if your up for trying something new?
I was told to finish my thought, i would repeat in my head "I'm scared" , "I'm going to die" until the event was over, and it was terrible. I gave myself a safety word for when i am feeling scared, everytime i feel scared i say "banannas bannanas bannnanas" (you can pick a different word i just choose bananas because they are not scary, and kinda funny)this shifts my attention long enough to complete my thought i ask myself "is being scared going to prevent anything?" "the worst that could happen is lets say death" "would being scared keep me alive?" The answer is always no....fear, paranoia and anxiety actually hinder your ability to react should the situation actually be bad. So i repeat in my head or sometimes out loud "your ok" "you can relax, nothing bad is actually happening" and i try to breath deeply while repeating comforting statements. Might be worth a shot.