Toddler puking !!!

Na

So my almost 2 year old has been waking up the past four night throwing up !! She doesn’t throw up when she naps , just at night time.. I took her to the pediatricians today and they basically told me they don’t know what’s wrong to give her another week and see if she’s still doing it 😔has anyone else went through this? I feel terrible for her because I don’t know what to do