I have been having a similar problem for almost a year and a half now.
What happens to my lymphnode is when I eat certain things my gland swells up and then it goes back down but not all the way.
My gland develops tiny small stones in it and then they distract out from the ducts underneath my tongue. I know it sounds strange, but its true.
It's not often that it distracts stones, only at times, but my gland still goes up and down.
You need to see a doctor that specializes in the neck area.
I see you actually live near me...isn't it a small world running across someone on the net that I actually don't know. Since that is, you probably have a doctors office called "Eye Ears Nose & Throat" near you, if not, there is one in Charlotte, NC.
That is where I went, except I do go to the one in Matthews, NC.
I hope this helps.