How long does this stomach flu last? Delilah (11months) started throwing up Monday night, yesterday she threw up a…

How long does this stomach flu last? Delilah (11months) started throwing up Monday night, yesterday she threw up a couple times in the morning/afternoon and seemed to be holding down a little food, she seemed fine today except for a low fever this am which went away, then about an hour ago she threw up all over me, got us both cleaned up and she just threw up all over me again a few mins ago. I just want her to feel better 😭