A few days ago I had sex with a girl I had been seeing for the last few weeks. I used a condom and as far as I know it was used correctly and there were no tears or any other problems. The following day I found out that this girl's ex boyfriend had been sleeping with another girl for a long time unprotected and she just tested positive for HIV. Also the last time the ex boyfriend had sex with the girl I had slept with was 2 weeks ago and this was also unprotected. Now im sure the chances are slim of having the first girl pass it from the guy to the girl I had sex with and then to me, especially since I used a condom, but should I be worried enough to get a test done?