Over the past 2 months every morning my first and second wee of the day smells really horrible and the smell lingers after I ve flushed the toilet. Also over the past week the first wee is always really dark ... more brown than green. Over the course of the day i drink tea and coffee at work and my urine becomes a pale green as the day progresses, plus the strong smell disappears. A couple of timesi have pain on my lower left side of my back. Can you help?