Alcohol is one of the triggering factor in IBS
If you are not stopping alcohol, spicy unhealthy junk food, there is no point in taking so many treatments.
If you and triggering the disease at one hand and treating with other, there wont be any improvement at all.
Try to stop alcohol,
Eat bland diet, liquid or semisolid in nature till the symptoms improve.
After that you can slowly change back to normal diet.