Did your Mammo and sono find anything? I had a negative mammo, negative sono, but did have enlarged lymph node. MRI was done, it too is negative, but the node was positive for breast cancer. Go figure. I am in the process of further testing then will start treatment. I have what is called occult breast cancer. Which means they cannot find the primary, but do have breast cancer in lymph node. Fortunately bone scan and whole body CT were both negative, except for node. Good luck on your test but have the MRI. Cancer can be a sneaky little devil. Chase it down and kick it's flank.