Re: I tested negative after 4 months...
95% of people WILL test + by three months. The CDCs recomended window period is 3 months, for the general population. 6 months for people who were exposed during a needlestick injury, or people with and exposure from a KNOW HIV+ individual. It is not fairly common, but it can happen, but 3 months is conclusive unless you have an extremly weak immune system, had an exposure from someone KNOWN to have HIV, or a needlestick injury in the case if healthworkers. There are only a FEW documented cases of it taking longer than a year, and those were questionable as to their EXACT date of exposure.
Also, keep in mind tests MUST be performed after the LAST possible exposure for it to count. Some people can not pinpoint there EXACT date of possible exposure, and there for test multiple times, and one time it may be negative, if it is still in the window period from their LAST exposure.
Everyone seroconverets diffrently/ But the ONLY people who take 6 months or longer to truly seroconvert are people with SEVERLY depressed immune systems, due to other immune deficincy illnesses, chemotherapy, Hep C and such. 6 months is recommended for needlestick injuries, because co-infection with Hep C can occur, and make it take longer, as the body attacks Hep C first, and because health workers are usually put on to a drug regimen to help fight off the virus before they are infected, making it possibly take longer to show up.
Your immune system may be strong, but your test doenst differ from anyone elses based on that, because it is only a SEVERLY weak system, that will affect the test.
Based on CDC information, guidlines, and Dr. recomendations, a test at 4 months is considered conclusive. Wether or not you choose to believe that, or need another test to give you reassurance, is up to you. Peace of mind is important, but your test is considered conclusive.
Good Luck and Be Safe