Hi and welcome to the site!
I don't take either of your meds, however, my best friend has IBS too and takes Bentyl. It makes her super drowsy. Usually she only takes it at night before bed. There's no way she would be able to make it through work, let alone be able to chase around her young child.
I've never heard of Chlor/Clidi... I will have to look it up.
Keep up the probiotics, they're wonderful!