Welcome to HW, Crimson Eagle -
Sorry you are experiencing these symptoms.
For dry eyes, yes, eye drops, but make sure they are LUBRICATING drops and that they do NOT contain any medications or preservatives. Good brands are Tears Naturale and GenTeal. For dry mouth try some of the Biotene products - they have mouthwash, spray, gum, etc. NOT lemon drops, both sugar and artificial sweeteners are hard on the teeth!
I personally would avoid the mouth biopsy - use the search feature above and you can find members accounts who have done that. I think the risk of permanent nerve damage (even in such a small spot) is greater than the benefit of getting a confirmed diagnosis, since it's quite possible to be treated without this information.
Burning sensation in eyes & skin -- sorry, no suggestions, maybe Prednisone would help, as this may be inflammation. Fatigue, joint & muscle pain - I'm surprised the rheumy didn't try you on Plaquenil (inhibits disease progression) and/or Prednisone (treats inflammation). She may be holding off on these while waiting for blood test results (inflammation markers).
Do you have a follow-up appointment with the rheumy?
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
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