Extender Injury Erectile Dysfunction

I know this is in the wrong place, but I’m still new so I can’t post in the injury section. About a week ago I tried using an extender for the first time. I wasn’t able to put it on the normal way(compress springs to body and fasten flaccid penis) so I tried it a different way by fastening my erect penis and letting it go flaccid. I did this for about 2 - 3 hours and in between the hours I took it off, massaged my penis and got erections to stimulate blood flow, my glans got a bit cold every once and awhile, but not numb.

After the day I did that I felt a light burning in my shaft and small shocks of pain. I couldn’t get a full erection any more, at most I might be able to get 50% on my back, sensitivity has also seemed to go down, but not sure as I am circumcised. I have not been masturbating or vigorously touching my penis since the pain. Burning pain is gone but I still get dull ache at base of my penis.

There is no discoloration or change in size, doctor said it looked normal, but referred me to a urologist who I am seeing in a couple days. I am terrified of whether this will go back to normal or require surgery.