swollen lymph nodes

Please Help if you can.....I've been told by doctors I have many symptoms of CFS now for about 5 years.  Fatigue,lack of concentration,sleep disturbance, swollen lymph nodes, ect...  The only thing that makes me wonder if I have something else is that my throat swells so much that I form a double chin.  (I usaully have pretty defined face) My face kinda gets a little round.  Mostly below the jaw line.  When my throat is not swollen, I dont feel sick.  I have also noticed that if I drink fresh squeezed lemons, it stings and makes the swelling go down a bit.  This is what has puzzled MANY doctors.  I know swollen Lymph nodes is common among CFS patients, but has anyone heard of a symptom like this??  Please shed any info that could help please.  Thank you.

Thanks. Allergic reactions have been brought up but it was a dead end. I'm currently seeing if it could be food allergies. I calculated that I've spent over $7K last year in doctor bills. And nobody even seems to be interested in helping. Thanks for the reply though.