Cereal Cramping Concerns - Cheerios, London England

London, England, United Kingdom

I haven't eaten cheerios for decades, but had a small bowl last night with oat milk (I regularly drink oat milk) and felt noticeably bloated in the morning but it subsided.
I had another small bowl today and shortly after experienced cramping in my stomach, slight nausea, and general discomfort.

I haven't consumed anything else apart from water, so I feel confident it's down to the cheerios. It's safe to say I will not be having cheerios again. | Symptoms: Nausea, Cramps