StellaC: I used to have backache during my 2nd trimester until I did my pelvic tilts exercise etc. I believe these exercises help to reduce backache.
ZPF: Diarrhea for the baby? My first time to hear this, sounds bad but I guess I will still stick to using the final rinse with hot water, then recycle the hot water to wash other things when necessary. The doctor doesn't seem very helpful to scold your friend. I mean, no one will know before it happens. Everyone has different hygiene level too.