DD 17 mos, started vomiting last night, cant keep anything down. Managed to drink a lot of water at 5am though then went back to sleep. Woke up hungry at 8 and had somemilk but brought it all back up. Then she was really really lethargic and just conking out on me, wanting to sleep on me. She is normally so active that the contrast is scary. I just don't know if this is a serious sign or if she is just tired due to being up all night being sick and feeling ill, like adults just want to sleep when tired. You can tell she is my PFB and hasn't really been sick before!! Should I leave her or call doctor?....