Uy, that's actually pretty common sa ganitong edad, pero understandable na nakakaalala ka, a few of us moms went through the same thing din when our babies were around that age. It could be na napapabasa lang siya ng dami ng milk or formula during the day kaya parang wala sa gabi, or sometimes their kidneys are still adjusting sa concentration ng urine. Best talaga na i-check mo with your pedia just to be sure everything's okay, pero most likely it's nothing to worry about, basta sumusuka pa sya ng regular at active ang baby mo, usually okay lang yan.