Oh, I misunderstood.  I thought you were saying that your current insurance didn't cover any pre-existing conditions.  This article on follow-up care explains what is usually done after breast cancer treatment.  Since you are having new symptoms, you need more than routine care to find out what is going on.  Many women have pain following breast and lymph node surgery, but typically that gradually gets better following treatment.  Assuming that this pain is new, I'd suggest going back to the doctor and asking more questions about possible causes (which could include scar tissue or nerve damage from the surgery, hormonal changes, infection, etc.)  Pain is not a typical breast cancer symptom, but with your breast cancer history, it makes sense to be assertive about getting your questions answered.  The doctor who has actually seen your chest and poked around is the best person to determine next steps.  If you feel he isn't taking your symptoms seriously enough, ask for a referral to a breast specialist or a doctor at a comprehensive cancer center.  I hope you soon get the answers you need.