4mo projectile 🤮 no 🤒

As

My 4.5 month old just projectile vomited 3 times in a row without warning this morning after waking. It was all breast milk. She doesn’t have a fever and was all smiles and giggles afterwards. After a bath and a few minutes of quiet time she’s eating again. Anyone’s LO done this? What causes it. I don’t assume she’s ill as her poopies are normal and she’s otherwise content and still hungry..