I had trouble breathing for two weeks (sob) but continued to vigorously exercise. Then, one morning, I had a sharp, quick, severe pain following the outline of my scapula (right). After that, I was very sob and felt like my preexisting gerd was seriously out of control. I spent the day ignoring the symptoms. Finally, by the next night, I went to the emergency department. I had a pneumothorax (R) and three PE (2 right and 1 left). Which came first? PE or collapse? Were they related? What caused the pain?

Summarized question: What are the causes for pneumothorax and pe?