HELP! Give me ALL your Tricks for Diarrhea and diaper rash

Please, please tell me anything , dont underestimate or hesitate. Baby girl is 5.5 mis, formula fed. Not sick, not in pain. But has diarrhea since 72 hours ago. pediatrician said to ride it out because nothing else can be done Poop amount is not a lot but liquid and VERY frequent, like every 1-1.5 hour, day and night I have her on sheets no diaper all day except for nap time I dont wipe, just run water then let it air dry and no diaper I have used A LOT of A&D and Three Paste with no progress If anything it’s getting worse

Im desperate at this point, haven’t slept in the last 48hrs, baby isn’t in pain nor sick or anything, she’s in a very good spirit

Please give me all your tricks for diarrhea and for rashes. Home remedies and I promise I’ll check with pediatrician before I do anything.

But PLEASE HELP!

ETA: i meant to say that baby isn’t in pin from diarrhea, but obviously in a lot of pain from the diaper rash