Welcome to HCM,
if you have been diagnosed with IBS I presume you are thoroughly investigated and nothing organic detected , you have to take care of your diet as advised,this episode could be having infective or parasite so please get your stool tested for R&M and if required suitable drugs antibiotics or anti helminthic drugs may be given.
If it is mal absorption it may be due to diet which you have taken.
In many patients prebiotics
and pro biotic supplementation helps a lot.
Usually we ask to avoid refined sugar and milk which can test for lactose intolerance
, fiber in diet usually helps, even giving psyllium
Regular exercise, yoga, meditation
or tai chi, may help to keep fit and symptom free
and musculotropic antispasmodic drugs specific to disease may be given to give relief.
Please take care