@rob70: Do you know why you were circumcised? did your parents tell you, even later?
What you describe reminds me of what happened to a cousin of mine, about my age (6 at the time). I don't know exactly who started it, whether it was a physical at school or his own family doctor, but the family doctor told his mother that it was abnormal that his foreskin did not retract and advise my aunt to try to forcibly retract it, repeatedly. He has some very vague remembrance of that, but I heard later that it was painful and he protested a lot (he does not remember crying about it!). Then all he remembers is that, during school holidays (so probably some months had come in between), he was taken to the hospital, anesthesiaed, and woke up with the tip of his penis in gauze (he remembers the weird look of his penis). He also remember going back to the family doctor to have the scar inspected and the last stiches (that were not dissolved) removed, just as you. And just like you, he did not understand until later that he had been circumcised; he has no remembrance of his intact penis.
How did this affect me? My aunt showed the result of the circumcision to my mother. We were not a Jewish or Muslim family so neither of them had seen a circumcised penis before and this must have impressed my mother (I think she originally did not understand that a part of my cousin actually had to be removed, and thought the surgery was less drastic). Then a bit later my aunt visited us. My mom had me drop my pants, my aunt had a look and commented that it did not look as bad as my cousin (of course I did not understand what they were talking about), then my mom tried to forcibly retract my foreskin, which she managed to do with much difficulty. Perhaps I was taken to the doctor as well.
So for a few years after that incident my mother, every so and then, inspected my penis and retracted the foreskin or had me retract it. Also, I was under strict orders to fully retract it every day (or, rather, every evening) and wash there with soap.