Bro flatron, no pt worrying unnecessarily. It'll destroy ur life. Just go for the test. U'll realise that uve been worrying too much... however ,if u do pass the test, remember the lesson and wear a condom next time or betta still refrain from casual sex (which i doubt u can.. hehe). ~My advice is go for the anonymous testing at DSC which is faster, better than visiting the doctors at DSC on normal days, cos some docs there really one hell kinda attitude, esp when u tell them ur worried abt contracting HIV,like view u like very kiasee like dat, and shows attitude, which in my opinion all docs be it GP or STD specialists shouldnt behave like dat. ....The volunteers of AFA who conduct the anonymous testing though are so much betta and more approachable.
Good luck to u~.