my louis has 4oz every feed pretty much, sometimes only 3 but more frequently is 4oz. however today after his feed this morn, literally an hour later he was hungry again and took aother ounce. h then slept for about 5 hours. then woke up, had another 4oz and wouldnt settle, was crying and wouldnt burp properly. he started sucking everything in sight like he does when hungry so i reluctantly gave him more, as nothing else would settle him, he then had aother oz....shoudll i up his feed to 5oz???? he will be four weeks old on friday....is this too much for him?