LOL I know what you mean, I worry too when DD would probably be absolutely fine. A lot of people choose to go completely nappiless from day one, nights and all. Mostly it's the mattress that concerns me, even though we have a protector on it.

You could put nappies in with a normal load I guess, but there's the issue of only using a very small amount of detergent with MCN to avoid build up. Your call.