so my sons been having bad diarrhea and it smells sooo bad 🤢 it doesn’t seem like his tummy hurts or anything, he’s…

so my sons been having bad diarrhea and it smells sooo bad 🤢 it doesn’t seem like his tummy hurts or anything, he’s acting fine. his poop is really liquidy and green, told his pediatrician and she told me to start giving him lactose free formula? I gave him 1 bottle yesterday and I know it’ll take time but it’s still diarrhea. she also told me to start taking my vitamins and everything which i started again yesterday. have any of you had this problem w your babies? what did you do to make it go back to normal? he’s going through more diapers than usual and it’s super messy