Lee, my thoughts are with you. It is difficult enough to face the immediate days ahead without thinking of carrying on with your passion for photography. I do not doubt that it still exists, but other concerns will make it difficult to find time or energy for any sort of self indulgence for some time. You have received excellent advice and support so far, so there is little I can add. I will say, however that you do need to take time for yourself, either with a camera or without. You need to indulge your needs in some small way.
It may be the furthest thing from your mind, but you should check out Philip Toledano's Days With my Father. Philip created a moving tribute to his father while caring for his own physical, mental and emotional health in difficult days. I am sure it was a difficult thing to undertake, but the result is a stunning portrait of love and life.