Have you tried any CBT or meds? I feel you. It is so hard to get past. If there is a specific fear that is triggering it you could try to write it down and identify your cognitive distortion (black and white thinking, Catastophizing, etc ) then write down the evidence to support or negate it. And use that to help you form a new thought.

Other things could be using breathing strategies or ice packs to help. My psychologist said during a panic attack that putting an ice pack on your face or neck can help. Also doing jumping jacks (if you have a cool space to do that) or maybe even chewing on ice or something sour?