I have had experience with immediate family having this diagnosis several times.
I am so sorry to hear of your prognosis. The most important thing for you to do right now is to keep a positive outlook. I cannot stress that enough. Find ways with your doctor that you can boost your own body's immune system, either medically, with antioxidant foods, and/or through holistic methods that don't interfere with your chemo treatments.
Are there any trips that you could take? Any concerts you would like to go to? People or family you want to see? Now is the time to do those things.
I will pray for you, man. Keep yourself steady and strong.