my baby is getting very cranky day by day...is this a normal behaviour of babies of this age

A. Teething can often lead to kids being really cranky so I don’t know whether your child has started to have teeth or not but with what you are mentioning into your question right now is mostly indicating towards that only and if the child is cranky and having a loss of appetite because of that that can be a situation can certainly be associated with deficiency of iron in the body