Hi Mike,
Yes I can relate somewhat. I too have swollen glands or lymph nodes in my neck but only on the right side. This is due to the irritation from the severe post nasal drip which has been going on for many months now which is allergy related.
I am just starting to feel a little better because the weather is cooling down somewhat where I live. I find the colder weather helps me to feel better and therefore, my swollen glands/nodes seem to go down quite a bit. But since the PND has not completely stopped, I still have a little swelling.
I do not experience the dry eyes but that could just be from the cold air (you said you leave your window open) and the warmth on your face could be due to an allergy. Sometimes, I feel flush and warm in the face and my eyes burn when my allergies are really acting up.
I am not a medical doctor so I do not intend to diagnose your condition but from what you have described, it very well could be some type of allergy. Do you have any other allergy symptoms, like, sneezing, runny nose, cough, etc?
I am dreading the next summer too...I always feel worse in the hot weather!