About 1year old. Is her health ok. ?

My baby is 1.4year old. She recovered from dengue, since 5months. Still her eating habits not revert as normal ... In fact she doesn't have hunger at all... No 3tyms food In a day... Or if she doesn't like or want to eat, she refuse ... I actually not compelling her, allowing her whenever she like to eat. It depends on time I gave food to her... She like to eat small portion at a tym in regular intervals like 1 n half hour. Am giving... Is it okay or what should I do to increase her appetite...??? Second thing is, my baby always use to cry or scream like anything else in midnight everyday... Once v comfort her she ll slp... She even not open her eyes but screaming like anything else... Today suddenly she throw up wat she had in dinner... Is tat bcos of intense cry or wat...?? Am sooo feared ... She s not having proper hunger, also she vomitted wat she had ... Is her health ok ...??