I think your self induced injury is very difficult to visualize.

An experienced urologist would be your best bet.

I personally don't understand how you could have done this.
Given all the potential injuries this part of the body can sustain in crimes, athletics, and surgeries, one would think a doctor
would be able to advise you.

There are websites that discuss circumscision injuries, done to infants, that manifest later in adults. I'd suggest you Google those keywords.

I don't think you need 40mg of B12, that seems like an awful lot. 5mg tops. You also need attention to omega-3's, B6 and folic acid, for nerve repair.