formula

My baby was born and started of on breast milk and then switched to formula to the blue can similac. Then we found out she was lactose and tolerant and had bad colics at 1 month so my doctor told me to give her similac alimentum...now at 3 months with that milk she got diarrhea non stop so my pediatrician changed her to nutramigen which made her cry non stop when she poops and she cant tolerate it this is the same reaction she had with the blue can similac😞😩 I hate seeing her suffer so much