How can I rule out cancer with no lump?

I’ve had this dull achiness in my testicles for about 5 days now. It kinda came out of nowhere but sometimes it flares up and hurts and other times it’s no more than a mild discomfort. Sometimes I feel pain in my lower abdomen and sometimes pain in my lymph nodes in the neck.

I’ve had two physical examinations this week by doctors and they say nothing feels off other than maybe a little swelling and I personally can’t feel any lumps. I can’t get an ultrasound done for another 4 days but I’m so anxious and worried and I need to get cancer ruled out or confirmed asap. What else should I be looking for? I’m losing sleep over this because I can’t stop freaking out😭