i think im lactose intolerant

okay so everyday at like 7:50 smth before the morning bell rings i grab like 3 cartons of milk from the guidance office because i dont give myself enough time to have breakfast in the mornings + i usually forget my wallet to buy smth to eat ++ some kid steals all the milk in the morning. i usually dont drink the first on until my first period but once i finish it omg (°〇°) im literally gripping onto the edge of my seat like i all of a sudden theres just the massive gurgling in my stomach and im starting to think i cant drink milk anymore LOL and even worse it always happens when the class is DEAD SILENNTTTT its so embarrising sometimes but it gets a little giggle out of me and my friends at like 8 am