Hello, I recently have been experiencing dull pain in my left testicle not much at all but when I was feeling around it feels like a vein or small tube has been enlarged and feels a bit hard but still squishy i produce very little sperm at all and have to pee everytime i wake up and have an erection as well. There is alot of full pain in my legs but this I arttributed to my back since I do have a very bad back.. I recently got tested for testosterone and was very low and have started androgel. What could be my problem?