Strong discomfort in left testicle, very strange ejaculate, crippling pain.

Im 18 years old and in my first year of college. I have never been sexually active, so that rules out an STD. I have experienced blueballs, and this is not the discomfort i am feeling. When i was young (about 8 years old) i remember having to take an anti-biotic because my left testicle was swollen, unfortunately i cannot remember much more. I dont masterbate that much, but it has become painful when i do not, so i do it once about every 1-3 days. The pain is getting increasingly worse, starting to carry over to after i masterbate as well. My ejaculate consists of strands with a gelatin kind of texture. They can be up to 1 inch long, and are very painful when exiting. I can feel them travel through the prostate and it is very concerning to me. I decided to write on here because i may have noticed a lump on the vein attached to the left testicle (im not sure if its a vein but whatever it is). It is the main source of the pain, and when i cough, it hurts as well, as if someone punched me in the groin. Please reply to this post, my pain is increasing by the day.