Hi Canuck,
I'm sorry as well that your still suffering with this...((Hugs)). The "Swish and Swallow" worked well for me, but I don't swallow it, I swish and spit. It will numb your throat if you swallow it.
I really don't know if folic acid is what is helping mine but, I don't have this problem much at all anymore since I've been taking folic acid. I rarely get mouth and nose ulcers as well. My Sjogren's numbers a very high, Anti-SSA and Anti-SSB.
I hope you get some much needed relief soon. Please keep us updated. You are in my thoughts and prayers.
Babs