I had PM implanted 10 days ago on a "rush" and didn't have any preparation time. In addition, my lung was nicked so I have a small pneumothorax. It is hard to discern whether small stabs of pain on left side - arm, shoulder, chest - are from healing process of surgery and collapsed lung or more serious. And I have so little energy. Feeling a bit discouraged and anxious. Any words of encouragement would be appreciated.