I've struggled with anxiety and panic attacks for a couple years now. I never used to have them which made me suspicious. Eventually I discovered that there is actually an external cause for it. Electromagnetic frequencies. I know that makes me sound like a quack but I was able to prove it by purchasing an EMF reader. I found that when I was exposed to higher than normal amounts of EMF, my anxiety went up right along with it.

Unfortunately there isn't much that stops EMF. I've tried living in 3 different places and no matter where I am, there's always EMF to deal with. One thing I've found that really helps is music. Loud music seems to kind of counter balance the effect the EMF has on me.

The other thing that helps a lot (and this may not be for you) is smoking weed.

Regardless, I wish you all the best. Anxiety sucks.