‘Toxic poops’

Does anyone else suffer from what I like to call ‘toxic poops,’ as I have no better way to describe them? I suffer from bladder and bowel incontinence, like most of you. When I have to go, I have to go. Sometimes I have seconds to make it to the toilet. Sometimes my bowel movements are normal. Other times, they are (for want of a better word)... Sinister. I can hold these, well they aren’t immediate but they come with a lot of stress. Ok this is without knowing I need the toilet, for example,I could have a tight chest, feel disoriented (to the point of thinking I could call an ambulance) but then I later realise I need the loo. And afterwards all those symptoms go away fairly immediately. I feel like my own body is poisoning me, hence ‘toxic poop.’ It should be noted, that the symptoms of this are not always the same, so I never know what it is when it is happening. I don’t know if it’s a general MS symptom. Or this. Or something else. It doesn’t happen frequently, I’d say once every couple of weeks. It doesn’t matter what I’ve eaten either as I’ve tried different diets to see if it’s an allergy or intolerance. Anybody else have this?