Hi hun,sos sorry you are feeling this way,my sister has diagnosed IBS & it is a terrible thing.
Firstly dairy foods & bread is a kick point for ibs sufferers.
May i sugest a visit to your doctor first to rule out anything else,they should have nutritionalists who can give you good dietry menus & needs.
My sister also visited a herbalist & drank cranberry juice.
Along with this and less dairy her symptoms are very tolerable.
I hope this helps.