I'm sorry you were exposed to HIV two years ago. How far after being exposed were you tested? Were you also treated for HIV after exposure?
Joint pain, muscle aches, swollen tonsils are not specific to HIV so try not to let this consume you. The ELISA test is initially done and if that comes out positive, then the confirmatory Western Blot test is done. If it is negative, then no further testing is done.
It would be wise to see your doctor due to your symptoms either way-- and if you would like to bring up your HIV scare, you can do so as well to see what your doctor's thoughts are on that.
Wishing you the best,