Povman congrats on the lifestyle changes. Not sure what might be causing symptoms but a psychiatrist might be able to suggest meds that would not trigger reactions and also could ease anxieties.

If you want a first aid approach you could try a simple breathing exercise.
Breathing exercise
If you are feeling very anxious or angry or just want to calm down, you can try a breathing exercise that takes the attention away from the trigger of anxiety to a simple tool of counting breaths.

Find a comfortable position seated or laying down. Begin to relax your breathing. Silently count 1 on the inhale, and two on the exhale. Then silently count 3 on the inhale and 4 on the exhale. Continue up to 10 or until you lose the count then return to one. No judgement. I sometimes end up at 18 then smile and return to 1. The idea is to focus on the breath and the counting and not get sucked into the anxiety or anger trigger. Also works to quiet the mind.