Idk what to do

My baby will be 4 months old on feb 9.

He use to eat 5 oz every 3-4 hours

Well about 1-2 weeks ago

He wants to eat every 1-2

Hours and doesn’t ever seem to get enough? I tried feeding him 6 oz he will still be hungry 1 hour or 1 and half hours later and idk what to do?