Pooping excessively

My 1 yr baby has been pooping pretty excessively on and off for a month. Sometimes its watery but not so excessively wet. So in generally when we go to the doctor we would show her poop pictures and complain about diarrhea. The doc prescribed hidrasec and probiotics but i dun see them helping much. She has started infant care and can poop up to 5-7 times a day. Although not everytime is a full load… she’s always been sent home from school due to pooping too excessively. I’ve tried to change her milk formula to a soybased lactose free one to see if it makes any difference… has any parent have such issues before??? #pleasehelp #diarrhea