I have a concern regarding my circumcision, which was performed when I was 13. I doubt it was completely done. How should I deal with this situation?
Bismihi ta'ala
To remove your doubt, see a doctor specialised in circumcision, to see whether or not the procedure was done correctly.
You can either show him a picture of your private part, or allow him to see, enough for him to assess.
And Allah knows best