Breastfeeding. Lactogen or nan pro 1!

I have consulted 2 pediatrician still not satisfied...can any body pls tell me how to b sure if my breast milk is sufficient for my baby or should I combine breast milk and bottle-feed?? If my baby don't breastfeed for 4 n hour my breast feels fuller if he demand every half n hour then I feel them empty..when I try to express that time not a single drop comes...then he cries...what should I do?? He is doing 5 - 6 wet diapers daily...my pediatrician saying that if he z wetting diapers that means he z getting sufficient milk...I want an complete answer pls m very tensed...my baby z a month old according to lactogen per feed he requires 120l ml milk..I don't think so my breasts producing this much milk per feed...if I have to supplement what should I use lactogen or nan pro 1