Disregard everything he said about your penis being almost indestructible...
All I ever did was newbie routine in a hot bathtub and it permanently fucked my life up beyond repair.
And there are plenty of stories like mine and other who are less severe.
The question you got to ask your self is: are you willing to die for a few cm?
Thats actually the reality, because once your dick goes numb and ED suicide is very close, I want to be brutally honest.
To put it in perspective:
Before PE:
I was working daily with a good income, doing very well for my age, also in school getting a good education, had my girlfriend(underwear model) who was willing to do anything, and we had frequent 3somes etc.
I had tons of friends, always socializing, basically at the age of 20, I was living the life and a lot of good things was on the horizon.
Then I discover PE and decide to get a extra inch on my dick
After PE:
Quit my job, couldn't focus or even bring myself out of bed anymore.
Quit school, dropped out, wasted a lot of money on that and I wont be going back.
Dropped my girl and told her I needed time, I can't be with her in this state...
I no longer really go out at all, it sounds extreme, but this is what it is, you don't feel hole, this is worse than losing loved ones, this is worse than being diagnosed with terminal disease and only having 10 more normal years to live...
At first you go into denial and wishful thinking occupies your time: "this is temporary, this will go away", then when it doesn't you start obsessing, reading everything about it on the internet, then as time goes on you start checking for sensitivity EVERYDAY in some desperate hope of one day feeling anything.
Some will say "not everyone reacts to a nerve injury like that" and I agree, sure, some may handle it better than me, but at the end of the day, we are a product of 3,7 billion year evolution where the single goal of our whole existence is sex.
EVERYTHING changes when you no longer experience sex.
It's not just your mentality towards sex, its EVERYTHING.
You start not caring about yourself _AT ALL_
Would I advice against PE? yes, if you have a average sized penis, don't risk it.
But if you have a "small penis" and you want to try, sure go ahead, MOST LIKELY nothing bad will come of it, but you have to ask yourself what risk you are willing to take.
I want to compare it to steroids, most people handle it pretty well, some get bad side effects and some kill themselves from severe depression.
Reading your symptoms, seems like there is no permanent damage done.
Just lay off PE and "hard sex" for a few weeks and it'll heal up, but you should really evaulate if you want to continue after that...