I just wanted to say that I can't tolerate SFS. I have heard several on the boards comment that they had a hard time with it, too. Sometimes switching to a different brand does help.
I would advise that you keep doing whatever it was that got you stable. If your attacks are worse with the SFS then I would stop....at least temporarily. After all, if you are starting to feel better why do something that makes you feel worse.
I know SFS has helped a lot of people on the boards...each of us is a little different, though, and need to do what works best. Sometimes, unfortunately, it's by trial & error.