My daughter was born 4 weeks ago & I breastfed her for her first fed and after that i started to formula feed her. shes had alot of problems & we have had to switch her formula a few times & although she has settled a bit, shes still having a bit of problems. I am wondering if it is too late to breastfeed? (I am still lactating) I am also a little confused on things like; how often a b/f bub needs to be fed, how do u know when they have had enough? etc. any help would be much appreciated.

Thanks