Since nov. Low back pain, pain on palp. Ll iliac abd., intermit. Pain umbilicalarea, trace blood & protein in urine. Kubneg. Likely cancer or no? Idea

List of problems. This list of problems can be from things like kidney stones to cancer. Best to get looked at by an md for testing.
Go see a doctor. You seem to have some experience in medicine judging by your question. Trace blood and protein in your urine is abnormal. Go see your primary care doctor, immediately. It is impossible to diagnose cancer over the internet.