I have stool smaples done and blood test done nothing showed up. i have got lower back pain and stomach cramps and feeling sick my pee is dark smells?

Consider ER if any: of the following are true: Not holding liquids down, lightheaded when standing, you have have diabetes, skin is persistently pale, low back pain turns to flank pain (6-10 in higher), frank blood in the urine or bowels, have a chronic illness where dehydration would be worrisome. You are dehydrated, perhaps that is it. I would continue clear liqiud diet, plan for an ER visit, hope not.