Best way to treat a pneumothorax?

I had a pneumothorax in February and it healed quite nicely after being put on an oxygen drip over night but it has come back and I really don't like hospitals or surgery, consider it an irrational fear... Anyway, I was wondering if there's anything I can do to help it but I have walk 6 miles a day from college against my will otherwise I have nowhere to sleep at night and I'd hate to give it up because I'd be behind on all my work so I can't cut down on strenuous movement and I'm doing my very best to quit smoking or just cut down although my doctor said smoking had no effect on it. I get very worried when I hear the broken bit of skin on my lung flapping about when I'm lying in bed trying to sleep and I don't wanna suffocate in my sleep. Taking deep breaths hurts my upper chest and lower back so thats kinda out of the question. Can anyone help me?