I've had blood in my semen for the past 3 weeks. It appears as a brown colour. I started reading up on what it could be and it said testicular cancer. Is this possible? I noticed that I have some pain in my right testicle, but this was only after reading about itonline, so maybe it's due to anxiety. I have no lumps - at least none that I can feel. I am 22. I also have blurred vision for some reason, but maybe it's unrelated.