I think you have been misinformed or have been reading about the high dose use of MTX in treatment of cancer. Is that possible. While it is true that you should not try to conceive while on IMT therapy such as MTX, most of the protocols have effect on sterility. They can harm an unborn infant, thus the warning not to conceive while on them.
There is a long term study, NIH-funded, multi-study looking at the question of cancer risk associated with use of IMT therapy to treat uveitis and other IOD. The findings were VERY reassuring and found absoutely no increased risk for uveitis patients as a result of IMT use. I don't have the reference in front of me, but can look it up when I get home if you like.
In fact, IMTs such as Methotrexate have been associated with improved cardia outcomes (lower inflammation risk) in a large co-hort of adults taking MTX for treatment of RA compared with a group of RA patients not taking MTX.
What medications have been proposed for you. Some, of course, do carry the risks you mention (for example, cytoxan), but they are quite rarely used and then only when the choice is pretty much between blindness and possible sterility.
You diagnosis is very clear, you have identified a cause for your uveitis, and infact the treatments for your kind of uveitis are very, very successful. Mine was cured.
Let us know how your consultation goes. Relax if you can. Lean all that you need to know. You are on the path to recovery, not more illness.
This resource on the website may be helpful:
Autoimmune Uveitis and Its Treatment
Welcome. You have certainly found the right spot in the ethers. You are not alone.
Liz