Bayi diarrhea

My 9 month old baby diarrhea for over a week now and she has lost her weight… Have been consulted with Doctor but they just told us to monitor her at home…. Im worry and scared at the same time… she’s eating and drinking fine but she will pooped 5 times a day or more…. Please someone share a tips to either stop the diarrhea or getting her weight up again… really appreciate it