FOAMY URINE Kidney Infections

I keep getting repeated foamy urine and what I think are kidney infections. I feel very weak and very tired. If I take some cranberry this helps but I dont know whats going on. All I am doing is taking some supplements to help my liver (Livertone Plus) and I keep getting these problems. I know if the liver isnt functioning properly it can affect the kidneys but wouldnt my liver supplement be helping that? Or is it the candida that causes kidney infections? Its every few weeks I am getting this foamy urine and weakness. I am confused as to what can be causing my kidneys problems. Maybe they are just sluggish and not off-loading the toxins (although I am drinking lots of water). Any help appreciated.