My Baby Is 6 Months Old..he Doesnt Take Formula Milk..he

My baby is 6 months old..he doesnt take formula milk..he is on my own feed..now i give him ceralac at night and fruits puree at noon..bt its been a week that he is not taking even my own milk..he cries alot whenever i give him my own milk.. can u plz tell me what can b the reason that he is not taking my milk..so now a days he is only taking two times solid feed..and one or two time milk..which i give him after alot of effort..and crying