i developed ibs after surviving a particularly nasty bout of food poisoning, which led to some time in hospital.
my bowel is permanantly damaged by it all.
i was almost house bound a year after, and had to plan 'pit' stops, because i had both the diahorrea, and constipation.
the prescribed stuff for the constippation was rapidly not effective enough, and i had to give up using boscopan as i had been using it for long time on a high dose....
my bowel doc was not that helpful, did suggest high fibre foods, but i was at the stage when high fibre foods really, really hurt.
i worked out that my gut was no longer able to process a larger number of foods, which is common with untreated food intolerances, as inner tubing, so to speak, gets inflammed and damaged.
i planned a diet to remove common triggers from my diet, milk/wheat/caffine/spicy foods/orange juice etc/and no wine!
i ate high fibre foods in very small amounts, for e.g 1 tablespoon of baked beans. i was careful not to have too much fibre in one 24 hour period, as that irritated every thing.
linseed, sprinkled on cereal, was good for the constipation.
after 6 weeks, added back in wheat,one portion in a 24 hr period, and then milk.
i have now had ibs for five years, and in the last two years stools are looking normal more often than not.
i try to have one wheat portion a day, and two small milk, if i have a flare up, which is often for e.g after christmas, when everyone forgets healthy eating, i simply go back on my exclusion diet.
someone suggested peppermint tea, which is really good and better than any shop brought stuff, it really helps with the pain of it all.
i also found lactose free milk to be helpful, i did try other milk substitutes, but didnt get on with them very well.
porrige in small amounts was helpful for regular bowel movements, but not until i had finsihed my exclusion diet, as again, it was a overload of fibre. which can lead to bowel slowing down completely.
i always obey the call to go to the loo,but try not to hang around, as it makes things worse.
try and go to the libary and do some research, rather than paying out for quack treatments.
good luck!