I basically have IBS D, but most often not definitely diarrhea, just chronically too-loose stool. I (so far fingers crossed) don't get horrible urgency or accidents. But I do get flatulence, sometimes trapped wind, my lower tummy swells up sometimes, and in the evenings after dinner I often get discomfort low down in my abdomen about 4 hours after eating. That might be gas moving. It's not painful, just uncomfortable. Passing wind can help but it usually goes away anyway in an hour or two.
A good thing is there are no other bad signs in my stools, and they do not have a bad smell, and when I pass wind it has no bad smell either.
Neither do I have any signs of malnutrition or vitamin /mineral deficiency, even though my diet is more restricted than it ought to be.
I can also get: heart palpitations, exhaustion, a feeling a bit like anxiety, slight dizziness sometimes, sensitivity to weather especially dark grey skies, and low pressure rainy weather, and the thaw after snow.