Monash Drug Information line? Dr Rodney Whyte there has the very latest info on drug safety during bfing. .. The number is 03 9594 2361.
That's the one I knew someone would know it, so I didn't go hunting for it

I'm so sorry to hear about the MS. How wonderful though that you have been able to put it off in order to have a baby and to breastfeed as long as you have! Seriously, keep that in mind while you work out your next steps. You've already achieved so much!

Definitely give the information line a call.. it certainly can't hurt.