My sons lymph nodes are more noticable when he has a major infection of course, but he has the one behind his right ear stay knotted up for the last two years. That was what prompted me to have him tested for allergies. The ones in groin area will also get larger and more noticable. He is currently receiving weekly injections for his allergies to mold and dust mites. They check his ear almost every time we are there. Some times it will be smaller but it is always there. It kinda scares me but they say its his body's way of showing that it is fighting something off.
Have you find out how to get rid of your mold? I have just went through sampling our air in our home and all and I went thru Commonwealth Labs. They were very helpful. I did the air sampling myself, they sent the equipment and explained how to do so.
I was told for what we have to use Dawn detergent to break up the mold, and then to wash down with White Vinegar. The allergy practioner is who told me this. She went to a conference and got some neat info. She also told me to dilute tea tree oil and spray my return air vents to kill any mold spores that may be floating around. We had our vents checked and were ok, but just to be safe we did this also anyway. It is a natural antiseptic. Very good for lots of other things as well.
Hope this helps.