Not good news, Flick. I'm sure you had a kick in the gutt feeling. You are having more tests soon and that IS a good idea. Not to be trite, but some of the tests can give a false positive because of something else going on.
With Sjogren's I understand that many people have it and the tests do not show it. Let us know how you made out at the doc's visit. Are you seeing a rheumatologist? If you got in so fast, you're lucky, because many have a 3 month waiting list.
Be sure and keep us posted. Good luck and it sounds like you have doctors who are on top of your situation. For them to even think to test you because you are a young male is sort of amazing.
Don't trust any refractive surgeon with YOUR eyes.
The Dry Eye Queen