Cutting out caffeine made a huge difference when I was getting debilitating anxiety about my old cat’s health (despite her being pretty much fine). Honestly, doing that was more helpful than therapy (though I’m not sure that I had the right therapist)

Other than that, going for a walk while on the phone with someone also really helped, as it kept me from spiralling thoughts and had me active.

In a pinch some really sour candy can help to knock you out of an anxiety attack too. You might want to have some on hand.