I've been to therapy and have been on medication for a few years now, and I feel as though my overall anxiety has greatly improved from where I started off. However, for about a year I've had a certain ongoing family issue that I have no control over, and every update or interaction I get, it's as if my body goes into self destruct mode. I get random panic attacks, I'll feel nauseous to the point of being bedridden, I break out in hives, or on a few awful occasions, vomit without any warning. 
It's awful, and has lasted up to a week before. I'm currently going through it right now, but it's as though the more I try to keep things together emotionally, the more my body fights against me. 

Anyone have any tips? Tricks? Or can at least relate to this? 
I hate knowing it's all in my head, but I'm still powerless.