Thanks for reply. In addition to IBS
for the moment you are also having chronic collitis this is what i believe from your reply. For its cure regularity of meals and proper freshly cooked meals non spicy and no fast food is a must for at least six month to restore the previous situation. Amongst herbal medicines i would recommend punarnava arisht viranga arisht 2 tsf tds with chitrak vati and lashun adi vati 1 tab. each tds.
also look if your water source is polluted . get it treated.