Many of us find that we simply can't work anymore - that's what happened to me. First I cut out everything else, leaving work as my only obligation. But then I couldn't keep up with even that, and had to cut back and cut back... until eventually I found myself on disability.
That being said, make sure you are eating as healthily as possible, getting as much deep restorative sleep as possible, and getting some moderate exercise. I find this helps give me energy for other things.
I don't know what your diagnosis is, what your symptoms are, what your treatment plan is, or what medications you are on, but in general when things start changing it's a good idea to check back in with your rheumatologist for a complete evaluation. Your fatigue may not even be related to Sjogren's!
But if you do have active auto-immune disease, there are a multitude of medications available. Maybe not specifically for fatigue, but to help with the things that are causing fatigue. Prednisone, Cellcept, Imuran, MTX, Benylsta, IVIG....
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde