I get them sometimes, I don't know what causes them either tho

I do, and they SUCK they’re so deadly and sudden. :,)

That's what many of my texts feel like and people always say the wrong thing and ask me what happened and what's wrong and it just frustrates me because I don't have an answer for them. They're also very persistent with the question and they won't stop asking until I break down into tears

Oh yeah. That's basically why my doctor put me on Clonazepam even though the antidepressants significantly reduced them. A lot of my panic attacks are idiopathic and having the PRN helps even if I decide not to take it that time (benzos are known to become less effective if you take them too frequently so when I get a panic attack I have to assess whether or not I think I need it or if I think I can wait it out). Having that control has helped me a lot.

If there's no trigger and you don't actually feel panicked (like you're only having the physical symptoms of a panic attack) there's also a chance it could be a heart condition called POTS syndrome. I get the physical symptoms of a panic attack randomly without any actual emotional distress

Mine are random too. Sometimes it hits during work and it's embarrassing