so on Christmas Day my three year old randomly just throws up but it was just white chunks in…

so on Christmas Day my three year old randomly just throws up but it was just white chunks in guessing that's milk and then it was clear , but then after she threw up she was fine no complains no fever no more vomiting and then today she throws up again. but after she throws up she acts like nothing happened she's running around singing but it was the same vomit same clear white chunks . I'm worried if it was a virus she would've vomited her lunch today and she didn't . Has any mommy experience this or is a nurse who can calm me down because google is not helping lol