Hey Felicity,
Sorry to hear you've gone downhill - and that your house has been under siege by the gastro monster!
I am now at the 8 week mark with SSZ - and have *finally* had 3 days in a row where I didn't feel like puking for most of the day! (just a little bit in the morning...)
Maybe try to MTX again - with an anti-emetic, maybe - Stemetil or Maxalon - altho' I can see the irony in taking a pill to counteract the side effects of *another* pill!
(I have toughed it out to date - just like being pregnant again - where I puked/felt nauseated every day until I gave birth... but if next week is lousy again, I think I will try an anti-emetic...)

Hope you can rest a bit in the upcoming school holidays,