MDR TB? CD? Tips& ur views & wht 2 do!

My son was diagnosed wd ITB wd narrow IC&ulcers.CTScan was done&it suggested TB.Gastroenterologist in our hometown put him on AKT bt stopped 2 of the 4 first line drugs after 2months, pyzina&combutol as my son hd swelling on knees&ankle.Meanwhile my son hd 3kgs of weight gain and no pain for 2 months.But after that things started to become more worse but still doctor kept on trying other medications on him until we decided to change the doctor after 2months so in the 5th month after AKT we went to another Gastro who put him on increased dose of Rcin,isokin&started Mesacol, still the pain and weight keep on fluctuate.So finally we decided to go to Apollo Hyd(23Oct19),there we came to know about seriousness of problem inside the intestine,after various tests,biopsy(one test will take2months)the Gastro there performed C/S and referred us to IDS dr.Who started Rcinex and asked us to wait for report,suggest-hv small meal&low fibre.Please suggest weight gain tips& ur views & wht 2 do Thanks.