I haven't had diarrhea from any probiotics...but I believe it's possible. It is changing the environment in your GI tract.
I wouldn't take anymore until your diarrhea subsides.
Something that may help you is bone broth.
Maybe after this you should reintroduce probiotics via food: Kefir, sauerkraut. And after a few weeks taking those, you could try reintroducing the VSL#3 but start even lower - maybe 15 billion total per day.
Moderator, Lyme Forum
Symp started April/2013; Buhner's Lyme May 15-July24/14; Igenex pos. July 3/14
Doxy: July 4-Aug.24/14;Zithro July26-Aug24/14; Amox + Proben. Aug. 29/14;
added biaxin Sept. 26/14
Disc. amox,added Ceftin Nov. 20th.;
Disc. biaxin added Buhner bart herbs Dec/14;Jan/15 pulsing Tinda (w/ Ceftin);
Abx/herb break Apr-July/15; July-mino; Aug. added Rif;
Nov./15 mino - to biaxi