Eating too much

My 3 month old (15weeks) suddenly starting eating much more then normal

He normally would eat 3-4 oz every 3-4hours he fell sick with a cold and was eating around 2oz every 4+hours he lost his appetite while being sick ok soon he was back to his 4oz but now he’s been wanting 6oz every 4 hours but that’s seems like a Lot he’s eating I’m worried it’s tooth much

He seems happy and full no problems but for a 3 month old it just seems too much

suggestions