What Causes Intermittent Cramps In Lower Abdomen?

I ve been having lower intestinal cramping on and off for 9 days along with symptoms of a bladder infection, slight pain when I urinate and tenderness in my lower GI. The pain comes and goes somewhat randomly I can go a couple of days with no pain at all and then it comes back with a vengeance. It feels like I m going to have diarrhea and every once in a while I do but not every time. Is this a food issue or something else? I don t feel sick but I m afraid to eat because the pain can be so severe in my lower intestines and I don t know what s causing it. Should I be worried?