Complaining
Grumbling
Whining
Making a fuss
Behaving petulantly
The exact translation depends on the context and the specific nuance you want to convey. For example, if someone is "nagdadabog" about a small issue, you might use "whining" or "making a fuss". If they are "nagdadabog" about a serious problem, "complaining" or "grumbling" might be more appropriate.