Yaeger, my mom started getting panic attacks when she was in her early twenties, my grandma got panic attacks when she was in her early twenties, I started getting panic attacks, and guess what? I'm in my early twenties. It can be one of a couple things. It can be psychological, where you are consciously making yourself panic, or it can be physical where something in your chemical and genetic make up isn't working properly. God gave us a sense of survival, He doesn't give us panic attacks. You can use your panic attacks as a way to get closer to Him, to have faith in Him. When you start panic-ing, do like what they said before, pray, sing praises, etc. However, unfortunately, if it's a physical problem, you are going to need meds. Nothing helps my mom's anxiety, she has to take lexipro for it. I am also supposed to take meds, but I control my anxiety by mentally overcoming the fear part of it. My heart still beats fast, I still shake, I still get dizzy and out of breath, and I still sweat, but those are PHYSICAL problems that the meds would fix. I deal with those and overcame the psychological fear by using my faith because I hate using meds. I can deal with randomly breaking out into panic attacks by closing my eyes, praying, assuring myself that I'm okay, and then I let the beating heart, sweats, etc just work themselves out after the panic attack goes away.
Not everything is a sign, not everything is a punishment from God, not everything is a demon attack, some things are simply because.