My baby is a month old.. since last 2-3 days she's getting cranky.. it's not colic..she is on my feed currently.. but I have a strong feeling that she isn't getting full. Bcoz of which she's latched on to me almost like always..formula is the only resort.. some of you might be totally against it, but what can one do.. you cant sit with the baby like this and also cant see your baby cry.. Suggestions please??

Also, what should be the diet of a lactating mother? Things she should be eating daily and how much for a good supply.