When a person tests positive for HIV, it is not a test for the virus itself but for antibodies to the virus, and the test is not able to distinguish between HIV antibodies and a multitude of other antibodies. Many conditions can lead to a false positive result, including flu shots, hepatitis, and pregnancy.
You have it easily in your power to increase the sum total of this world's happiness now. How? By giving a few words of sincere appreciation to someone who is lonely or discouraged. Perhaps you will forget tomorrow the kind words you say today, but the recipient may cherish them over a lifetime.
If I really want to improve my situation, I can work on the one thing over which I have control-myself. I can stop trying to shape up my wife and can work on my own weaknesses. I can focus an being a great marriage partner, a source of unconditional love and support. Hopefully, my wife will feel the power of proactive example and respond in kind. But, whether she does or doesn't, the most positive way I can influence my situation is to work on myself, on my being.