Ileo colitis? ITB? Different from itb?

Hello Sir/Madam, I was diagnosed with ITB and initially put on Anti TB Drugs, which worked for 2 months with weight gain after that my doctor stopped Pyzina 750 and combutol 800 and continued Rcin and Isokin due to swelling on my joints. The pain increased and appetite and weight again dwindled down. Still continued treatment for more months and he prescribed Mesacol 1.2 GM and Mycolon but nothing worked. So started treatment at Hyderabad and there we came to know about the exact damage is in small intestine while colon is also involved(previous dr was not able to reach in small intestine in colonoscopy). The Gastroenterologist in Hyd then refers to IDS who put me on Rcinex 600 and Benadon 40mg after which weight gain and increase in appetite is there. He wrote Ileocolitis on the notepad. What's it and how's it different from ITB? Are there any suggestions and tips from you regarding the same? How long will it take me to get cure?