H.V.
maybe have her checked out for allergies and to see if anything else might be wrong. She sounds like she's had the same kind of sleeping pattern as our son Daniel. He's 19 mths old. and sometimes he'd sleep great and other times he would wake, uncontrollable at night and have a hard time falling back to sleep. It turns out he has an IgA deficiency and now we're trying him on the gluten free diet to see if it will help. He also has had diarrhea since forever...and has been going downward on his weight scale. I don't know what your daughter maybe experiencing but I think it may be a good idea to rule out any underlying health issues. best to you and your daughter.