Breathing skills and self grounding are my go to fixes, Exercise, I prefer Yoga as its calming. Hot showers are wonderful also..

My breathing skill that drops my anxiety in minutes is... Focus on what the air "feels" like entering your lungs ,,, takes a bit of practice , but once your able to zero in on "feeling of the air going into your lungs" it works in minutes .. Mine "feels cool and minty. Wash rinse and repeat. Worth a try.

Hope your feeling better soon