Just yesterday I started having a pain in my right testicle. Today, the pain was a lot worse. I've had like swollen glands in my groin about 5 months ago or so. I initially thought this could be related. So, I decided to inspect my testicle and found I can feel a very small, hard, round knot on the top of my testicle. It's not part of the epididymus or whatever, it's on my actual testicle. Any sort of pressure on or near this knot causes intense pain like if being kicked in the testicle. I've scheduled a doctor's appointment, but I'm just really worried about this. Please reply ASAP. This just happened out of nowhere yesterday and I just noticed the knot today.