Had my first ever few panic attacks two weeks ago, felt like I was dying etc, first started with a brain zap and then panic, and then the worst happened before bed which really messed me up, most times I was able to bring myself under control fairly quickly in terms of rapid heart etc but it was the overriding fear that's hung around. The following week I had what felt like a panic attack hangover. Restlessness, chest plunging sensations of dread, chest tightness, sharp pains over my chest, prickly tingling feelings in my hand, and eventually they subsided.

I'm a regular road cyclist, so I've been out as usual, and my fitness is as good as it was, no issues at all.

Whilst the chest plunging feelings eventually dulled in pull (I'd like it to going over a sharp hump back bridge), I've been left with this feeling of fear, every odd sensation I experience almost drags me back into that panic. Sometimes when I'm on the edge of that, even reading about these things edge's me out closer. 

It feels like I've terrified myself and I can't get over the fear of it. I'm not usually one to worry myself, but it's an automatic reaction every time I feel a minor pain in my head or tightness, or odd sensation

How do you get over that and break the chain reaction?