Just wanted to send you lots of love and say am thinking of you I agree with the others that when they say "underlying medical condition" they probably do mean diabetes or something like that. I have never heard of your symptoms and I have a friend who has eye cancer, and her symptoms were NOTHING like yours. I promise.
When they say potentially serious, they probably mean they want to make sure they fix before it affects your eyesight.
Try to keep calm and do please let us know what happens.
xxxxxxxx