Hi, 32 wks here and busy getting through my baby shopping list:-) I'm sure I read somewhere that waterproof sheets aren't really needed for newborns as that's what their nappy is for but my mum made a valid point about vomit.....do you need them incase the baby vomits? I bought a waterproof mattress protector for my cot as it was a good deal on Amazon but haven't for my bedside crib or pram/carrycot and not sure if I need to?