Please do get a testicular exam, especially if you are 18-35. It lasts less than 30 seconds, is painless and not embarassing - it's just a penis.
Testicular cancer has a better prognosis when caught early. Find a lump/some swelling? No need to worry mate - be a man and get it checked. Learn how to do TSE's as well! We men have to take better care of ourselves overall, exercise, and eat better.