Hey man, nine months ago I wrote the same post. If you're like me, you will go through many emotional stages (disbelief, fear, confusion, hurt, anger-at yourself and your infector...). As the first poster said, BREATHE!
At this point there is no reason to spend time worrying. Use the energy to take care of yourself, educate yourself about the disease (even if you don't have it) and begin to prepare for the worst while you hope for the best.
If you'd like to communicate with me about details, you may send me a private message. If not, I'll be rooting for you and waiting to hear your results.