Kate, if the doctor can't or hasn't told you why your lymph nodes are swollen, you should definitely get another opinion. Clearly there's something going on that's making them swell; usually it's a sign of infection or something else your white blood cells don't like. I'd pursue this if I were you; either make the doctor do more tests to ascertain what's up, or ask for a referral to another doctor for a second opinion. Good luck - PJH