You really should have all the necessary tests done to make sure there isn't something else that's causing your problems. web page Here's the link that will discuss in further detail the kind of tests that need to be done to illiminate all other possibilities.
As far as the SFS goes, I can't tolerate the Acacia. I use Benefiber, but I'm also a C not a D.
Good luck and I hope you're feeling better soon. {{{{HUGS}}}}
-------------------- ~ Rachel (IBS-C)
If life hands you lemons, make lemonade!!