Need Idea And Advise - Toddler Health

Hindi nkapagpanew born Yung panganay ko, what other possible test Yung pwedeng gawin nalang at his age (5 y/o) Para ma test or check if healthy sya or what, sakitin po kasi sya mabilis sya ubuhin o lagnatin. May case din na we want to know if may ADHD ba sya or what kasi super kulit nya kahit sabhan mo Mag behave, iba Yung pag kakabehave nya. Yes we know under development pa sya at Bata pa pero as parent we wanted to make sure if healthy at okay sya as he grow up.. Maybe we just need an answer or idea or someone who could answer na may atleast same case..