If you've had the test and came negative, you're most likely fine. They reccmommend HIV testing 30 days after infection, at 3 and 6 months and at one year. However, if they don't even find the virus in your blood the first test, you're fine. i know its nerve racking, I've been there before. You're chance of having HIV are 1/ 1,000,000,000,000,000,000
The testing schedule now for HIV is now 3 months. IF you have had a KNOWN exposure (as in you had unprotected sex with someone you KNOW for sure is HIV+), then test again at 6 months, but if you don't, testing at 3 months is fine.
Testing at one month isn't a bad idea either. 90% of those who have HIV will test positive at 1 month.