I have never had problems with bowel movements. This afternoon I had Diarrhea with Blood (alot and bright red)

Could it be food posioning? All I had was a breakfast burrito from Mc Donalds and a vitamin water. I feel fine other then the cold I currently have. I do ocionally have cramps on my left lower abdomen. And I have had kidney stones in the past? I have an appointment with the doctors next week.