Sorry for the delay in responding, I've been crazy busy at work due to a promotion. Thanks to those who were concerned enough about me to send me PMs asking about my welfare.
Here's a big update.
So, as the erection pretty much hadn't gone away by last Friday, I scheduled an appointment with a urologist. I wanted to see Dr. Karpman, a renowned Bay Area urologist who specializes in penile disorders like Peyronie's but he couldn't take an appointment on short notice and so I made an appointment with his junior partner, Dr. Kong. Dr. Kong specialized in urinary incontinence though and so I was skeptical that he would be knowledgeable in this area, which you'll see turned out to be true.
So my appointment was for yesterday, and when I got to the examining room the Dr. couldn't disguise his shock and bewilderment. He literally said he had never seen anything like it before -- which I felt was a bit unprofessional since you really don't want to hear that from your doctor even if it is true. So he sent me to get an ultrasound, which they could do right in the office. A nice lady starts doing the ultrasound and then shortly calls in the doctor. She found scarring throughout the penis, and the Dr. was getting pretty excited about it and started calling them tumors. My scrotum is also swollen a fair bit and so he asked her to ultrasound my balls too and in that case they found all sorts of scarring (I've had calcium chloride injections, lots of heavy ball busting, and so forth over the years) but he also thought they were tumors.
So he sat me down and said that based on what he saw that he would likely have to remove both testicles and my penis! I got really happy, but then he decided he needed a second opinion and so he called in Dr. Karpmann, the guy I wanted to see in the first place.
Dr. Karpman comes in, takes one look and says "what did you inject into your penis"? I denied doing injections and so he left the room and came back with a laptop. He started showing me pictures of his other patients that injected things into the penis, and of course it looked exactly like my injury.
So I came clean and told him. He was really cool about it and said that I'd come to the right guy and he could help me. Of course he assumes that what I want is restoration rather than removal. So he talked to me and said that the scarring is likely to progress, becoming painful and causing severe curvature (basically Peyronie's) and that he recommends that I get a penile prosthesis to help keep it stretched and straight. He is apparently the top penile prosthesis guy in the US, with a couple thousand patients under his belt. He showed me a video of his penile implant surgery, which is billed as minimally invasive but frankly still looks pretty brutal to me -- you can see his video here:
https://www.youtube.com/watch?v=CEpEPl81VKk
Anyway, they still want to rule out any cancer with some blood work, and I have a follow up with Dr. Karpman on Thursday May 5.
Note, I don't intend to get a penile implant as I don't really care about the state of my penis.
Also, the ultrasound showed good blood flow, although I have "venous leakage" which is creating the erection. But no issue with ischemia, necrosis or blood clotting to worry about.