Testicular Cancer Worries

During a self exam, i found a small , pea size shape lump on my right testical. I went to my regular doctor, who had me have a ultra sound done. After the radioligist read the ultra sound, he said that he could see a mass in the right testical. I was sent to a Uroligist. He looked at the ultra sound , examed my testical, and said it need to be removed. He wanted to do this the same day, but I had to schedule it for a week later, should I get a second opinion, or is this the standard course of action. He said that this is the only way to see if it was cancer, was to remove the testical.