affects of prednisone on Sjogren\'s

Does anyone know whether taking prednisone will aggravate Sjogren's Syndrom by drying out the body more?  In particular, the lung?  I've been diagnosed with COPD and have been on a nebulizer 3 times/day as well as an inhaler once/day and I've heard that these things may add to the dryness of the lung.  The breathing has become quite compromised and so a visit to my practitioner today resulted in a prescription for prednisone.  I've not been diagnosed with Sjogren's yet but my daughter has been doing research and everything she finds seems to correlate with my present condition.   What kinds of doctors have diagnosed you for sjogren's?  I need to see if I have the syndrome for sure and then work on treating my breathing issues with medicines that won't make the syndrome worse. Many thanks, Clever Canine