Abit personal but needs to be answered!?

so basically, ive been to the doctor a lot lately because im suffering from severe bloating and have been for about 5 months now, i have got abit of bloackage in my gut (from poo) so im on fybogel, this hasnt made a difference and been taking it for nearly a month now, before i was on movicol and this didnt budge it either. im always feeling tired, anxious for no reason and feeling quite depressed! now im thinking maybe i have a food intolerance? i cannot burp but i know this isnt the case because ive never been this bad and my brother and dad cant burp and they are not going through what i have been for months! please help!