Worried. I have testicular cancer, tender hard lump three years

Hello guys, first time poster! I'm from United Kingdom, hello once again.

Cut a long story short, three years ago I noticed a tiny hard lump on my right testicle. The size of a pinhead. In the space of three years, The lump has tripled in size. Around one month ago I have been getting bizarre symptoms. My right testicle is very tender to touch, I have complete loss of appetite, dull aching sensation in my lower back. And slight shortness of breath. Slight stinging sensation when passing water and Ejaculation. Please note I have received a number of ultrasounds over the space of three years and have a number of cysts in both epidermis... My concern is the lump on my right testicle was never detected in the ultrasounds.. Last year I did see a urologist and he did feel the lump, and confirmed it was on the surface of the testicle, he was under the impression it was a cyst. Although he did not do an ultrasound... I recently went to accident and emergency due to my pain and symptoms and now awaiting emergency ultrasound and emergency urology referral.. I have also had and urine sample taken which has come back clear.

I have a few questions. If anyone could answer...


Is it possible the ultrasound was unable to detect the lump because it was too small?


When a testicle is infected with cancer does the whole testicle show up as a solid mass?


If my next ultrasound is unable to detect the lump. What should I do?


Is it still possible to have a cancerous lump which is unable to be detected, even though the testicle looks completely normal on ultrasound?


I'm really concerned, because I have had the lump for three years now and only recently been getting these symptoms. I guess all I can do now is wait for the ultrasound and urology appointment, which is 2 or 3 weeks away


I recently had an ultrasound on my stomach because I damaged my abdominal muscle belly in a sporting injury, I don't suppose that would find any abnormalities in a stomach region with regards to the organs?

it's probably worth mentioning also, my left leg has been going completely numb on and off, for the past two days... I'm slightly concerned because I'm pretty sure it's connected towards the back pain... Some type of compression on the nerves?

Apologies for this poorly constructed message, I'm using a voice recognition program to control my PC because I have repetitive strain injury on both arms
. Thanks very much!!