Good news! Nothing you did puts you at risk for HIV. In order to be at risk for HIV, you would have to:
1) have unprotected vaginal or anal sex - no condom, and you would have to penetrate a vagina or anus, not just get fluids on your penis,
2) share intravenous drug equipment with another intravenous drug user. You sound like a smart young man, so I am guessing you don't do drugs.
So, you can forget about HIV entirely. If you want to ask about other STDs, you can ask in the STD community here: http://www.medhelp.org/forums/STDs/show/98