Hello. Yes IBS can be very sporadic, and definitely stress related, although I have learned that it is very different from one person to the next. If I have an appointment or really anything involving leaving the house just the thought of it sends my stomach into overdrive. I can have pretty regular days bowel wise then without warning have a REALLY BAD episode. Good luck with everything try to keep stress at a minimum as best as you can, but also remember that even without stress you can still have flare ups. Hope this helps.