Yes, I had one totally out of the blue one night watching Friday telly (having never had them before) about 4 months after leaving my husband. I couldn't fathom what was happening to me, thought maybe I was having a heart attack, convinced I would drop dead on the floor too be found by small DC the following morning. It was the most completely terrifying thing that had ever happened to me, and once I worked out what was going on I felt like my mind had let me down, I couldn't fathom as to why this had happened to capable, resourceful ME who previously thought anyone suffering anxiety was just "putting it on" 
I spent the night petrified, but thankfully had arranged to go somewhere the following day with a good friend and her DC, when she turned up I just sort of fell at her gibbering on about it and she was amazing, talked through it with me and kept me occupied, and stayed on into the evening to make sure I would be ok. She even drove me to Boots with our collective 5 DC so I could buy Rescue Remedy and Kalms, I was desperate! On the Monday I went to the GP who prescribed me beta blockers, with instructions to take one if I felt the panic rising again. After I had those I relaxed a bit, because the logical part of my brain, knowing the tablets were there gave me reassurance, in the end I only had to take a couple, shortly afterwards when I felt the fear rising again.
It's dreadful, because you can't stop it, no matter how much you try and talk yourself down thinking "it's just a panic attack it will pass"... thats what makes them so bloody terrifying, that out of control feeling. And then once it's stopped you're terrified you might have another! It's a vicious circle 
It helped me to understand that firstly it is ok not to always be strong, and that a panic attack wasn't going to kill me, and I always had tablets or a friend to call if I ever had one again. So far one year on, although I have felt occasionally like I might have one again, so far, touch wood, I have been able to nip it in the bud.
I do wish you all the best and hope that gives you a bit of reassurance, have one of these 