Milk, milk, milk,๐Ÿฎ๐Ÿ„

Dumb question. Baby will turn 1 year tomorrow ๐ŸŽ‰. I have enough formula for about 2 more days. Can i just stop cold turkey and start giving milk when its done? Ive given baby milk about 2 times last week to see how he would do and he loved it and not constipated at all ๐Ÿ˜ท. Would that be ok? DR appointment isnt till Sept since thats the only time they had available.