Can’t remember if I responded so here goes (maybe again).
Mine is better then it used to be but I can be triggered, and anxiety attacks feel like a weight inside my chest trying to burst out. I remember they sued to be really bad on crowded buses and once I had to get off before my stop and I fell to the ground and started throwing up. Thankfully, I’m “better” now. I have tools to combat my reactions.
I have PTSD and for years was closing my eyes when I felt severely anxious, trying to block out the problem (usually noise). I found out the VA suggests keeping your eyes open and trying to focus on something else, if you can’t take yourself away from the situation. I’m not a vet but their section in a handbook for vets helped me immensely, and then I was able to pass the booklet along to a man who I know has PTSD from combat.
Take slow, deep breaths. Try to leave the situation but if you can’t, focus on something else. Remind yourself that anxiety is a reaction, not “reality”. No one dies from an anxiety attack (although, like I said before, I have thrown up from one).