this was one of the best hospitals in the country where i have received treatment for many things it has the authority of the AID and STD STI control board in my country
Your thinking is both absurd and irrational.This may have happened in Africa years ago but not in other countries.
You are most likely having an irrational phobia. i don't know about your country but in most licensed clinics around the world, needles are disposed of once used. To make yourself happy, get a test at week 12 from that date. Just chill, anxiety alone can cause many symptoms. And make sure the guy unpacks the syringe in front of you this time :)