You might have a mild case of food poisoning, or something else from your diet (an allergic reaction or otherwise). Often after a case of the runs, which clean out the bowels pretty fast, it's a couple of days before you build up normal stool again, so you might just not have much waiting to go out at this point. Not that this is a possibility that is very high on the list, but there is also a form of Covid that manifests as a GI disturbance instead of a lung or respiratory problem.
I'm glad you went tot he doctor. Gastritis? Are you under stress? If it keeps up, I'd look into irritable bowel syndrome?