It is certainly possible that these symptoms are related to the poisons that you have taken in the incidence that you described. These have the characteristics of flashback experiences that are very similar to what happens when people take other drugs or take too high a dose of other drugs or take recreational drugs that have been contaminated with other substances. In any case, it causes a form of panic attacks and you need to be treated for the panic attacks with medication. I suggest you talk to your doctor about Klonopin or xanax. If the attacks persist you may want to consider psychotherapy and other medications.
It was after that incident that I decided I had to return to America. On the plane trip back I had yet another one of these attacks. I had another 2 after I got back when going out to dinner with my family. Then they stopped. It has been 3 weeks and it hasn't happened. So I had hoped it had gone away. 3 days ago every day for 3 hours or so I had a straining feeling around my heart (or lung?). I thought little of it, but last night it was bad enough where I had to go home from work early. Tonight I just had to go home again as it got to an unbearable level. Again my I experienced the same symptons as my first attack.
I have had some freak crazy things happen to me both in Japan and back in America. In Japan I had that incident where someone slipped something in my drink. Here, just a few days ago, I was out at a bar with the people from work. I was outside wanting a cig, and ran out. I bummed one off of a guy from work, and then started freaking out later in the night and had to go home. The next day the dude said he dipped those cigarrettes in embalming fluid. After looking that up on the internet, I found out they had pcp in them.
I guess I just need some advice. As the doctors found nothing wrong with my body after multiple visits, could these attacks only be temporary as a result of those 2 things that happened to me, or longer?