If you have issues with lactose and wheat...look further into this diet please?
Easiest fix I have found and I struggled with IBS for most my adult life. Horrible symptoms, going between C and D most times, never feeling fully evacuated, etc. Just horrible swelling in abdomen, legs, fingers, and face....you name it. Add in horrible breath & BO to boot. I didn't even have gas for almost a decade...big tip off something isn't right. Lost sensation in my digestive tract and could never feel hungry or full.
I have been doing a FODMAPS diet for about 4 months and I am so happy I stumbled onto it!! My sports stamina and speed is way up, I no longer have brain fog or get depressed so easy, and then there's all the IBS problems...resolving or gone. Please look into it. Nothing to buy, just modify your diet. Good luck!