Hi Nette,
I too am considering probiotics, but am hesitating for some of the reasons brought up here. Don't want to stir things up since I'm having such good success with the NSD.
I have been reading this blog by Dr. Art Ayers called
Cooling Inflammation and he talks quite a bit about probiotics. Use the "search" feature in the upper left corner as his blog is not exactly the most user friendly. I'm still up in the air about probiotics. Hope you have some success! Maybe stick w/the NSD very strictly first before doing probiotics? Anyway, good luck!