K.R.
The lethargy part has me most concerned. I was once told in regards to fever that the temperature, isn't as important as behavior, so if they are lethargic, I hope you mentioned that to your doctor when you called. My daughter often gets diarrhea when prescribed antibiotics, for that I was told to go to a Publix pharmacy and ask for LACTINEX. Publix is convenient for us, you may call and ask your local or nearby pharmacy for it, it cost around 10.00; it's chewable and really, really, helps. If they have fevers I would worry about Rotavirus; obviously fluids are very important, but sugary liquids can make it worse, that is when I learned of white grape juice; for some reason it doesn't cause diarrhea like apple juice some times can - it's the only juice we drink now. If I were you I would call the doctor back and talk to some one until you feel confident in the answers or recommendations you get. FOLLOW YOUR INSTINCTS; it's one of your greatest tools as a mother. I hope this helps, I feel for you - do try the LACTINEX, but if there is fever, you should take them in, children dehydrate easily. Best wishes!