It...had stitches? There??
You, my good sir, have a higher tolerance than I will ever hope to achieve.
Now to business...firstly, don't worry about it feeling strange at the moment. You've had this for the better part of 30 years now, correct? It's naturally going to feel a little strange after being corrected. I used to sport a small, benign bone tumor on my right wrist...little sensitive bump that I had to keep in mind at all times (it wasn't anything serious, but bumping that little sucker HURT). Once it was gone, and my wrist sort of...lol matched...the other one, it felt infinitely weirder than having to explain the tumor over and over again. Give it a little time, and it'll become more natural.
Secondly, don't beat yourself up over "wasted opportunities." They're hardly wasted. You're young my friend...lol you're in no rush for time. So relax...focus less on it, and it'll come easier. As far as the diminished drive goes, again, don't stress yourself out too much. Ironically, the more you worry about it, typically the harder it becomes (no pun intended

). Think of it like this. You're worried about your sex drive, increasing your stress. Your increased stress takes you out of the mood. By being out of the mood, you're stressed...see the cycle? Give yourself some time for things to even out, and I trust things will be just fine.
Lastly, I should say, your English is excellent for being your second language.
Good luck bud. Take it easy, and try and relax. Things'll be just fine.
My best,
Harley