My baby has diarrhea for 2 weeks now. She is still drinking normally. We changed formula milk to soymilk and gives her probiotic. Is it normal ? No blood trace in the stool. TIA

I think your baby is fine. Sounds like your baby's digestive system is still getting used to the change of milk and the extra probiotics. As long as she is drinking normally means that she is not dehydrated or at the risk of getting dehydrated. It should go away soon -- keep monitoring if baby shows any other symptoms that could be worrying, like blood in the poo, discomfort, pain or loss of appetite.