At work (in a different office to my usual one) and just had a really bad panic attack, probably my worst ever. Was sure I was having a heart attack, had full chest, light headedness, chills up and down, legs felt like jelly, etc. Was in a meeting at the time which made the panic worse so had to excuse myself - everytime I go back into the room I feel like it's about to happen again. Just don't know how to tell myself that I'm not having a heart attack and it's only a panic attack - everytime feels like this is the one. I try telling myself it's fine but my body ignores it (. Hate feeling like this.