This might be a symnptoms of acid reflux or gerd or functional dyspepsia, but its an upper gi issues, not a lower one like IBS.
Sometimes it can just happen though, but if its on a regular basis I would get checked out.
I am not a doctor. All information I present is for educational purposes only and should not be subsituted for the advise of a qualified health care provider.
Please make sure you have your symptoms diagnosed by a medical practitioner or a doctor.