All I can do is to tell you, that I understand.
I too have several of these mean diseases and when I was put on MTX, I was hoping I could someday feel almost normal again, less pain, less flares and so on.
Now I found out, that the MTX really did a number on my liver and I had to stop taking it.
If it's not one thing, it's another.
I was really worried about my liver too and imagined the worst, like liver failure, but I calmed myself down.
We have to deal with things, when they are here, but not before.
I may have been dealt a bad hand, but at least I'm still playing with a full deck. ( most of the time anyway).