Yes, me too.
My last bad one was last week, I was that convinced I was about to keel over I was telling my DM (who was visiting) to ring 999 straight away if I become unresponsive. It is so embarrassing to look back on but in the moment i really can't be convinced that something terrible isn't happening to me. I spent the remainder of the day in bed exhausted from it all.
I have propanolol beta blockers for emergencies and they do help, I'm also having emdr for PTSD which is the primary contributor to the attacks (My PTSD that is, not the emdr)
It does help me somewhat to remind myself in the moment "this is a panic attack, it has happened before and I'm going to be fine, it will pass"
My therapist taught me how to do proper diaphragm breathing exercises which help too, I'm rubbish at explaining the technique but a quick Google will show you better than I can.
Something else my therapist advised was to have a tissue with a strong scent on it such as perfume or an essential oil, in my bag, to smell when I become anxious - it helps to ground me and bring me back to the now.
Meditation is also good for mindfulness, there are plenty of good guided meditation videos on YouTube. I watch and listen to 'The Anxiety Guy' often.
I'm yet to try CBT as I'm working my way through EMDR at the moment but I've heard nothing but good things about it so I definitely think that's worth looking into.
You have my sympathies they really are awful things to suffer with.