I had my daughter on every different kind of formula there was. Nothing worked. Then, it dawned on me, maybe I should just quit changing her formula!
That didn't work either. But I guess I learned to live with it. She cried in the evenings between 4-9pm. Every night for months.
Maybe he is going through a growing spurt. Now that my daughter is older, she tells me her bones hurt and she sometimes cries about it. This comes during the same general time she is eating more.
Just a thought. Good luck with whatever you try and whatever works for you!