Ayaw dumede

Hello po. First time mom here. My baby is going 4 months in a week. Super worried po kami ng daddy nya kasi lately wala sya gana demede. Formula fed po si baby. Super takaw nya magsleep. Minsan umaabot pa ng 10 hrs or more tas gigising saglit then antok ulit sya. May times po na 12 hrs na ayaw nya padin dumede kasi mas gusto nya magsleep. Need ko na po ba magcheck sa pedia?