My second round in treatment just this last year, I had only Lyme and my lymph nodes swelled up nicely as well.
What it really is is your lymph nodes getting swollen. Bart has an affinity for them, but it doesn't matter what infection you have, your lymph nodes can swell, as they are the first line of filters for getting debris (dead bacteria & that) out of the blood. So it's no wonder that they swell from time to time.
There are some herbs that can help keep things moving more smoothly like red root, and you should be doing lymph massages. You can do your own:
www.youtube.com/watch?v=QA-wi0d7-Ro