The Metallic sensation may be blood that you are detecting. Usually diffuse symptoms - many of the same kind of thing but in different areas is indicative of something other than cancer. Nothing is every 100 percent of course, and sometimes you will get a primary with maybe another somewhere else but a lot of whitish patches makes me think infection. I do have to say - after my biopsy - i did have burning and tingling where the tumor had been cut. But again I'd agree with your dr. likely not malignant, however if it doesn't respond to her treatment, then push to have a biopsy done. better safe than sorry.