My girl after the MMR jab , fever comes in at the 6th day, so now she having high fever and mouth ulcer, but today we can see her mouth ulcer is recovering but these 2 nite, she will wake up and cry with her eye closed at least 2 times, is it call nite terror? Can anyone advice how long will these phase usually last? What can we do about it?Or is there any other issue that she wake up and cry?