Girls, problem, baby has been pooping for a week, we've been seeing…

Girls, problem, baby has been pooping for a week, we've been seeing doctors prescribing treatment. But nothing helps and doctors just shrug their shoulders (well, what can we do if your treatment doesn't work). What should I do? Where to run? I don't understand anything anymore. Refuses to eat partially on this background he is losing weight. Not admitted to the hospital for some reason they don't explain. Who can advise? Head hurts.