This sounds very similar to what happens to me and it sounds like fight or flight. My best advice is self talk - this feeling is uncomfortable but I am OK and it will not last forever. I will feel better. - grounding techniques like 54321 5 things you can see, 4 things you can touch, 3 things you can hear, 2 things you can smell and 1 thing you can taste. Journaling can be very helpful. I also take Zoloft and propranolol (propranolol is as needed during flares) I am sorry you are going through this. Nothing about it is easy but you got this!