I had a similar experience with cocaine. Well, not really similar and not as severe but... you'll see.
This was about 2.5 years ago. I had been doing cocaine every 4-7 days for about 6 months. I was not addicted and, in fact, I didn't really like cocaine (or any other stimulants for that matter) but I did it just because it was "cheap" and readily available.
This night I started out light and was doing a few lines of cocaine every 30-60minutes or so. One of my "friends" (the dealer) asked for a ride home so I said, "no problem". We got to his house and we were hanging out in the garage doing lines. They were used to doing a lot so I tried to keep up with them. I did a lot more than I usually did. I had to go so they pressured me to do one more huge line. I did it. I took my friend to the gas station so he could pick up some beers and while he was inside I started feeling extremely nervous and agitated. My skin was starting to get clamy and I was starting to tremble. I had to get out of the car and pace up and down in front of the gas station. I dropped him off at his house and proceeded to go back to my other friend's house. The dealer was concerned and told me to call as soon as I got to my other friend's house.
I got about 1/3 of the way there when my legs started feeling really heavy and my extremities started tingling. I got so scared (and confused because even though I was very familiar with the area I couldn't think of how to drive to the hospital) that I pulled over at a grocery store and called 911 from a payphone. When I got to the hospital my symptoms started to get worse. I had severe tachycardia and I almost passed out several times. I was hyperventilating and at one point it seemed like my whole body went numb and I had tunnel vision. The symptoms slowly tapered off throughout the next couple of hours and about an hour after I felt better, I was released.
I am no longer able to take any type of stimulant without having a panic attack that feels like an overdose. In fact, even drugs with very mild stimulant effects such as cannabis and pseudoephedrine have given me panic attacks since then. Once, a Soma (muscle relaxer) gave me a panic attack. I also get very nervous every time I take an opiate painkiller and feel any euphoric effects (only legally prescribed ones, of course). I get this irrational fear that I am overdosing even though I know I'm not and have taken less than that amount before and not even been close to ODing.
I'm just wondering if these symptoms are purely psychological or if there is something physically wrong with me, as well. Maybe some mild form of post traumatic stress disorder? Even the SLIGHTEST amount of cocaine sent me into an almost immediate, debilitating panic attack.
P.S. I never had a panic attack until that day (if that is all it was). Also, a good thing has come from this. I can longer do stimulants.