I had what in retrospect was some sort of panic attack that triggered tachycardia that lasted for around two hours. I’m not kidding, but for about two hours, my heart was beating at something like 180 bpm.
It was night and I was in the middle of nowhere Croatia (going from Pakrac to Zagreb) after just having finished up a three-month volunteer stint there. Apparently, all the stress of saying goodbye, being highly caffeinated, and decompressing from three months in a post-war town just hit me all at once. As soon as I got my backpack off on that empty train, I felt a sudden warmth in my stomach. My heart began to race, my vision started to tunnel, my extremities got all tingly and numb, and my thoughts became fragmented. I sat down, tried to relax, but it wouldn’t stop. There was nobody else on the train except for a sleeping conductor. I honestly thought those were going to be my last moments on earth.
A half hour later, I get off at a stop to change trains to Zagreb. My heart is still racing along at around 180 bpm, but I’m not experiencing any lightheadedness or numbness in my extremities. My thought process gets all crazy at this point. I get on the wrong train, knowingly, and ask the local in Croatian whether this is the train to Zagreb as it starts pulling away. He answers no, and tells me to get off at the next stop. I didn’t care, I just felt that I needed to be moving, for some reason. At the next stop, I get off with my backpack, and sit outside the station. I contemplate telling the station master that I need to get to a hospital, but decide against it, because of some weird paranoid delusion that he’s going to kill me. He sees me freezing outside and invites me in. I accept, but I still have the idea he’s going to shoot me or something. The next train doesn’t arrive for an hour.
In the meanwhile, I’m in this dissociative state, where I feel the push and pull of the rational side of my brain (no, this guy isn’t going to kill you, you’re having some weird paranoid attack) and the insane, freaking out side of my brain that is telling me I’m going to die, whether through my heart exploding or through this guy killing me. I try to breathe deep and calm down, but nothing is helping.
Finally, one hour later, I get on the train. I manage to somehow fall asleep, but my heart is still racing. Even when I awoke in Zagreb to transfer to Budapest, my heart rate was still elevated, in the low 100s, I would guess. It took me a full 36 hours to get back to “normal” mentally and physically.
I have never experienced anything as intense as that before or since. My doctor did not seem to be too concerned about it, but, man, it was fucked up.