I'm sorry you are having so much trouble.
I had a collasped lung on April 25. Also on my right side (I read in a CF book that they happen more often on the patient's most problematic side...I've always had trouble with my right side). It was very painful. They placed a chest tube in. It was there for about a week, then it got infected so it had to be pulled with a sliver at the top still down. My doctor told me there was a chance that it could collaspe again because we had to pull the chest tube before all the air was out, but more likely the air would go away over time. I went to my CF doc in June and the xray showed that it had completely healed (thank god). It has not collaspe again (knock on wood). I hope I never experience that again. But I will admit that everytime I have the slightest chest pain, I am afraid that it might happen again. My CF doc did tell me things to not do (like holding my breath while exercising or lifting objects, swimming/holding my breath underwater...basically anything that would increase pressure in my lungs over any extended period of time) so I would not increase my risk of it happening again.
Maybe your docs are pulling your chest tube too soon? I hope the cycle stops and you get feeling better soon. Good luck.