Lymph nodes can be swollen from infection or due to just being sick with a cold.
MRI.......core bx........and stop the WORRY!!! It's spending energy you need for other things if your tests indicate more. Worry is non productive, zaps you, scares you. Be positive; whatever turns up can be managed. Don't spend your energy points on fruitless, pointless worry. Worry does no good to you or anyone else. It's worthless. Think pink, smile, drink lots of water, eat healthy, exercise, live your life, and just go through the process to figure out what's going on. Get 2nd opinions too!!