The ultrasound showed that my epididymis was swollen, but as far as the testicle goes both the u/s and ct came back negative. They did check the bladder and kidney with the ct scan as well, and everything was normal in that aspect. I did talk with the dr today and he said he thinks the problem is isolated to my epididymis only and the chances of there being cancer there is less than 5%. So far I'm thinking I'll see another dr and see what he says, then go from there.