Thank you so much for everyone's advice.
I have disregarded my doc's advice/suggestion to discontinue breastfeeding, and continued nursing my daughter.
Gave her the BRAT diet through the entire period of diarrhea, which was effectively 7 to 8 days.
Things got from multiples watery poops to 2-3 solidish poops to eventually 1 poop a day.
Gave her lots of rehydration fluid, lactose free formula (Isomil) and breastmilk (water would be good too, but unfortunately my daughter hates water and only takes a few sips at one go.) I did not give her usual formula (cow's milk based) till her diarrhea was completely cleared. She was also on lacteol fort (some sort of good bacteria), they came in sachets and were prescribed by the doc.
As told by my doc, I should not attempt to prepare homemade rehydration fluid (silly me was desperate and ignorant on the first day of her condition) Just a fyi!
Am glad things are back on track again. Baby's appetite seems to have improved (even better than pre-diarrhea days) which is a huge relief. Fingers crossed that she could gain some much needed weight quickly! =)