Is this normal? Or is something else going on?

My son is 16 weeks and I think he's going through a wonder week. He usually feeds about every two hours during the day, but know he feeds about every 3 or 3 1/2 hours during the day for only a couple minutes. He still has his regular diapers.

Also when I notice he's getting hungry I get him into the breastfeeding position and he screams and screams until he latches. Then he's perfectly happy and content.

Is this normal?? He didn't do this before, only if I was taking too long getting my boob out haha