Aww mama, nakaka-alala yan! Hoarse voice sa 5-month-old usually from crying too much or sometimes viral, kaya best talaga to check with your pedia kung kailan siya magsisimula ulit ng normal voice niya, they can make sure it's nothing serious. A few of us moms na napansin yan sa babies namin, nataruhan lang siya with time, pero kailangan talaga ng doctor's reassurance, lalo na since ganitong maaga pa lang siya, para ma-rule out any throat irritation. In the meantime, keep her hydrated (breastmilk or formula, depende sa setup ninyo) and try to comfort her so she doesn't cry more, rest lang talaga ang kailangan ng boses niya! Kaya ninyo yan, mama!