I was listening to what the teacher, Mr. Foster, had to say about it when all of a sudden, I felt very faint. I tried to walk a bit to shake it off. My head started screaming. I woke up on the floor (I had passed out), the teacher trying to revive me. Some of the students were chuckling. Mr. Foster told the class that he had seen this happen to many people over the years. After a few minutes, I got up and took it easy for the rest of that period.
I didn't think my fainting had anything to do with the lung being there. I just chalked it up to it being a hot day and the fact that I had just gotten my period.
I got a better idea of what I was dealing with a few months later.
I will go over the details in a future entry.