My 2 week old has diaper rash! :((( what's the safest diaper rash cream to use? Anything else I should be doing?

For diaper rash Desitin works wonders. It'll probably clear by the next diaper change or within 24hours. It's very creamy and the zinc oxide acts as a good layer between the excretions and the skin. Otherwise use cotton balls with cool boiled water to clean baby's bum and apply coconut oil. May take a longer time but it's a natural solution. Wear a cloth diaper instead if possible to allow air circulation.