i was just wondering for any advice from you more experienced yorkie addicts

once a puppy becomes around 4 months old is that equivalent to a babies "terrible twos"? my little guy was so good then once he turned 4months old, he stopped listening, getting him to eat is a chore, he won't sleep till about midnite. a few months ago my problem was sleeping too much, now he's not sleeping for me LOL. any help or advice out there?
Thank you so much for any help