Its been two months since my Bub born, breast milk made him colic and i switched to formula but now formula also making him unhappy i tried few brands but so far bub is so unhappy and colicy crying all day. otherwise he is gaining weight and a healthy baby.

I still have some milk so i tried to why not to switch back to BF and this time thinking to change my diet completely so bub could not get colic or wind.
He liked BF too I am feeding him time to time today.

Could any one help me how long it takes to get back the supply, I don't want to deprive him and if milk supply is not enough i want to keep him on formula side by side.

suggestion is much needed.
thanks