My DS1 had augmentin (sp?) when he was just over 1.5 i think. My memory is failing me a little here but i think it was when he was suffering multiple ear infections and and the ab's weren't working. We were then prescribed augmentin and we got the gastro like symptoms. I think we'd been in contact with someone who'd had gastro so my initial thought was that but i then figured out it was the meds. Never again will i give him or any of my children that stuff. Behaviour wise it was too long ago for me to remember i'm sorry. But i hope you get some answers and your little girl back soon