When we are diagnosed with something severe, the most common reaction is denial, desperation to see how we will handle it, and the environment usually worries more than we do.
This helps neither to accept nor to move forward, but we must be loving and kind to ourselves and the environment.
Once you accept the situation you will look for alternatives, information, and everything that can help you to face this path.
Gather a group of people to advise you, a nutritionist, a homeopath, biodecodification or NLP techniques, everything that you feel will help you to go through this new experience that life gives you to grow.
And if you can, and you can navigate it with humor, with acceptance, and with total confidence in your higher self, in your guides.