Blood test results back, a little confused?

So i recently got my blood test results back. Sorry if this is all a little confusing, I am just relaying what was in the letter to this question. My HIV - 1/HIV - 2 Antibody Screen came up as positive, the lady I talked to said that this was an ELISA test. So they decided that they would followup with an HIV - 1 Antibody Confirmatory Test, which came back as negative they also did this for HIV - 2, which was negative. In the end they did a Multiplex HIV - 1/HBV/HCV NAT test which was negative. Im just so confused and worried that I have HIV, even though all the followup tests are negative. I can't exactly remember the last time I had sex, maybe a few weeks before that, and I used a condom. Can anyone explain to me if I am clean and safe or should I get another test in a few weeks. I should also mention that when I gave the test I felt a little sick and I have been since the test was administered on June 1, I might have mono. Would this complicate the results I get? Any help or explanation would be greatly appreciated.