Well, that helps - here is a Support Group that may be a good fit for you:
https://connect.mayoclinic.org/group/autoimmune-diseases/
On that page, you can click "Start a new discussion"
I would suggest a title like "Interested in Methotrexate. I have Sjogrens and Osteoarthritis
Then tell a little about yourself and why you are considering it.

Or you might find this discussion of interest to you:
https://connect.mayoclinic.org/discussion/would-like-to-hear-from-people-with-sjogrens/?pg=5#comment-922588
If you read it and click "Reply" you can enter your message there.

If you need more help, feel free to ask!
Sue