Could Swollen Testicular Tubes Causing Achy Pain In My Lower Back And Testicle Be An Infection?

Hello please help it looks like one of my testes tubes is swollen and it causing an achy pain on my lower right back and testicle, I have had unprotected sex recently. N:b I went to see a doctor and was given antibiotics injections and oral medication because initially the whole testicle was swollen