Does The Symptoms Of Nausea, Lower Back Pain, Headache And Frequent Urination Indicate Kidney Problems?

I'm concerned regarding these symptoms and trying to determine if I may be having kidney problems. My symptoms include nausea that comes and goes, low back pain, fatigue, headache, frequent urination that has recently been foamy and bubbly. I have been to physicians twice over past 2 months and no Uti. I do have interstitial cystitis and borderline diabetes which is treated with metformin. Had a very light period a few wks ago but no positive preg test. Just wondering if this sounds kidney related or what might be causing these symptoms. Thanks!