L.A.
Mom, this is normal.
He may just not be hungry. Don't you sometimes just not have an appetite?
Just offer him what you would normally feed him. Do NOT make this a big deal. When he is hungry again he will eat.
If he refuses, then he is done. No need to beg or run around trying to please him. Do not take it personally or worry. Just let him BF or give him milk and let him be. I promise when he is hungry he is going to let you know.