Why Am I Having Brown Discharge Along With Bladder Infection?

I have been experience symptoms similiar to a bladder infection for approx. 2 weeks now. There are days when it is far worse and others where it only seems to be there in the evening. I have been drinking lots of water and cranberry juice and cut down on my sugars. Now my period in near and I have been getting a lot of brown discharge. should I be worried, see a dr or will it go away on its own??