I'm a little worried guys tell me what you think... My daughter seems to be okay, no fever, she is…

I'm a little worried guys tell me what you think... My daughter seems to be okay, no fever, she is eating normal, normal behaviour....but every single night (since Saturday ) (only in the middle of the night) she throws up in her crib and it's A LOT!! What do you think I should do ...what do you think it could be?