Rach, have you been checked for sarcoidosis? The loss of hair rang a bell. I worked with a teacher who suddenly lost a patch of hair (although hers was on her head). She had breathing, heart, BP, lymph node swelling, and visual problems. It took AGES for them to figure out what was wrong with her. Steroids would mask her symptoms somewhat, too.

http://www.stopsarcoidosis.org/sarcoidosis/symptoms.htm