the lumps are a sign of impending mastitis i would say...suggestion.. see a different doctor (am not sure if you are able to at the moment thou) tell them that you are still b/f, a few little fibs, and ask for antibodics for the mastitis?
Stop b/f thou.. even thou it relieves the pressue, you are still stimulating the hormones etc.
If you have any issues getting the sage, let me know.. i will see what i can do for you as well.