I have read your thread, some things are similar, the testicle pain after the incident and the general pain but I did not have split streaming. Loss of morning wood, yes this is what I had and still do. Yes it is a bad situation, but I damaged only the suspensory ligament thank God.
It is difficult to know what advice to give but do see specialists, what ever the cost, my pain has cost me more than money. When you see the specialists be confident explain in detail what happened, say a girl did it or something. It effects results you get in exams, carrer choices, sports you feel like doing, girls you date everything. It is all to do with sleep deprivation.
As for erections after my incident I could get erections and urinating was the same. The erections were never the same as before the incident. Before maybe 6 daytime erections , now and after the incident hardly ever.
Given the choice back then, pain was driving me mad, was the testicle pain causing pain in the penis? Given the choice back then if it came to losing a testicle and no pain. I would have gladly had a testicle removed.
It is a difficult situation with no easy answers , good luck and keep me informed. Diesel.