Heat rash ?

It's normal but if it doesnt subside please consult a pediatrician

Yes it happened to a few babies I know and one of my babies too

It will dissapear , my nephew had it too previously

Looks like Baby acne, my girl also have it!!!!

Yes, many mummies in my edd group has it

Maybe can switch on aircon for baby?

Normal for newborn

Yes I use mustela