DD has been throwing up since about 4:00am. She’ll throw up, then nurse a little, then fall asleep, then wake up and do it all again. When I changed her diaper at about 5:00 this morning, it was completely dry. Now she’s still wearing the same one I changed her into and that one is completely dry. I’m starting to get concerned about dehydration. Is there anything I can do besides just try to nurse and nurse? I don't know what to do because she won't keep anything down.