Hello family,
About two weeks ago, I had similar symptoms of IBS after taking a lemon with some oil juice. I suffered repeated abdominal pains and diarrhoea until just yesterday that I started feeling better. I never visited the hospital but I stopped taking my vitamin c (corvite). Now I feel better. My brother also had chest pains from the supplement.
I think it will be a great advice to cut down acidic foods which may increase the acidic level in your stomach (prevent/treat gastritis).
I'm better now, I know how it feels and Hope you all get well soon.