I agree with Tanya. If it hurts, it's either a lymph node or an infection or both.
But it could be blocking something else behind it.
I'm sorry that the doctor said she was confused. Not a good word to use. "The doctor would like more information" would be nice.
Ahem.
Oftentimes, science gets in the way of a good bedside manner.
I've had breast cancer. I was very lucky--it was microscopic. Several other people in my family have had it. The good news is, this is 2015 and it is very treatable.
Warm hugs coming your way. I hate the waiting part.