Vomit like merlion

Hi mummies my 1 mth plus baby vomit like merlion yesterday noon once and now which is 1.50am. It never happen before. Is it sth wrong with her tummy or is becos due to moving her ard after her feed? As I burped her for 15 mins, changed diaper den burp upright for 20 mins den put her down to swaddle.