Cancer, nerves, injury?

I have had flank pain for over a year, it's always been bilateral and never hurt at the same time. It can be dull and sometimes sharp. I also will get low back pain that comes and goes on both sides of the low back. Sometimes it also goes to upper back, also the joints in my arms,hands legs. I had an ultrasound done to see if there was anything fishy looking weather it be stones or maybe a mass and nothing showed up (last may 2015). Eventually the pains went away but would come back at random. For about a month these have come back but I notice my joints seem to get shooting pain mode often, esp the legs loud the quads,knees,ankle,feet. Happen to both legs at different times. Also the flank pain again is bilateral and goes at different times. Is this a symptom of late stage cancer? I am in my 20s and workout but all this stArted happening while taking a 2 week off from lifting. I keep thinking about it and looking up symptoms and it all comes too cancer.

Cancer, nerves, injury?