Do you have that too?

Hello, as you can see in the picture, it's about me having a testicular tumor in 2020 at the age of 13 but I didn't have cancer, but the testicle was removed from my right testicle and since then I've had regular MRI appointments, blood tests, etc. in the hospital. It got better and better every month until I had to go every six months and that's still the case now. Now I've found this little ball on my left testicle, as you can see in the picture. My testicle itself isn't particularly big. Sometimes it's a bit hard, but not very hard, and sometimes it's relatively soft and when I look in the mirror, I don't see it that much bigger. When I go to the surface, I don't feel any lumps or anything else except the bottom and top, which is probably the one next to the testicle because it feels so light. I can't find anything else on the surface of my testicles except for this spot or what is it? Can someone tell me what this is because I was worried and it immediately turned out to be cancerous again. I googled it because I'm so worried. I called the hospital and I've been given another appointment for a check-up on the 22nd, but I'd like to know if anyone knows anything about this, because otherwise I'll just hang my head in the air. See you next Friday.