I’M FREAKING OUT

Sooooo my 5 month old projectile vomited about 3 times when I was about to burp her....😭 IT WAS THE SCARIEST THING IVE EVER SEEN. Nothing different happened today as far as feeding goes, so why did this happen? She rarely ever spits up so this was traumatic. Have any other mothers experienced this? If so was your baby sick? I’m so confused and worried!!!!! FTM if you can’t tell...