Sir, My Baby(male) 1month 2days Weight 4kgs, ,daily Having Little

Sir,
My baby(male) 1month 2days weight 4kgs, ,daily having little watery stools in that having milk substance (undigest), stools passing little little continuously then he is crying complete Day, and He won't sleep properly day and night, continuously coming flatulent, after giving milk we are doing burping also... Giving Mother milk only, local doctor suggested Us colimex-Df drops, aristrozyme drops ...we are using past 2weeks..then also no result...please suggest Us any medicine for improving digestion and tell us our baby problem and suggest us controlling measures...