Stomach problem, bomitting and dysentry.

My girl child has stomach problem regarding two and half years still continuing, she doesn't take any good oil food ,if then bomitting occur and dysentery with pain and many things happens in stomach problem ,we don't understand. i took her to many child specialist but they can't observe her or not take any responsibility regarding case and said many unnecessary views upon us . i could not satisfied regarding that year and face every week such problem , i am being harassed from running near changing doctors and many more. but case is still in such condition no recovery ,she is not perfect for one month .how much medicine i give to her such high antibiotics , her health becomes down day after day. what i do now please recommend me some ideas to whom near i go for recover fully after being treatment.it's great request from my side.