HIV Test accuracy?

I have had a negative hiv 1-2 EIA antibody test two years after a very low risk "exposure" of having unprotected sex twice with my best friend (him a male me a female).I know for a fact he has only had two other partners than myself both of whom i know and they dont seem permisquos at all. I have had not had sex since then. Should I fully trust this test. For some reason because I have been diagnosed with mono twice two years apart (neither episode being very bad) I have it in my head that I must have HIV and a bad immune system:(
HELP

What people normally call and HIV test is actually an HIV screen. It has a very low false negative rate. In other words, if you have the disease, you are very unlikely to test negative on this test. However, it has a high false positive rate. Meaning that many people who test positive don't really have HIV (this actually happened to my ex-girlfriend's mother). If you test positive, you need a very expensive ELIZA test, which is definitive.

That being said, your risk of HIV is extremely low unless you or your partners engage in sex with homosexuals, use drugs, have sex with the prison population or prostitutes. AIDS cases are clustered among these populations and has a VERY low incidence outside those populations and those with immediate contact with those populations.

First of all you should trust the test. HIV can take up to ten years to show up. However you have lead a safe lifestyle for the most part and you need to have faith in the test. Then you have to have enough respect for yourself not to have unprotected sex anymore.
Mono twice two years apart is not that bad. It is a fairly commen sickness and as long as you healed from it fine you have no reason to worry. Especially if you have not had any other illnesses.
Also you can have a poor immune system without having HIV.

It takes a few weeks for HIV to show up on blood tests but after two years if you had it it would show up.Stop worrying about it, you are O.K.

Go here for more information to relieve your mind - http://www.avert.org/testing.htm

Here is a quote from that page - "Most people develop these antibodies within 3 months of infection. In rare cases, it can take up to 6 months. It would be extremely uncommon to take longer than 6 months for antibodies to develop.

In my opinion, testing for antibodies is not a totally reliable test. If a live virus were introduced directly into the bloodstream it would take about two weeks for the initial cells to become infected. Antibodies would only occur at certain times.