Stomach bug

Reese had her first stomach bug last night/today.
She was totally fine yesterday then all of a sudden at 9pm she started throwing up. No fever just puking. Poor baby puked all night long.
She slept most of the day today and pretty much just watched tv and snuggled (so not like her!) but she ate normally and seemed to feel ok.
So who knows what the heck happened wether it was food or a virus!
Just glad the puking has stopped