Welcome to health care magic forum
pain generally don`t persist for so long if you have got it done from qualified doctor & govt.approved centre. Production of breast milk is due to hormone prolactin
. So get your serum prolactin level tested. For pain consult the gynec& get tested to find the cause & get it treated .Hb,TLC
,DLC ,urine complete,& ultrasound
of abdomen is required to find the cause.
Wish you good health