I am so sorry to hear about your son, and many of us here know first hand the experience you are standing in, @Kgizmo. Take some time and read the posts within this forum. You will find some comfort in knowing you are not alone, and there are many very experienced loved ones and parents to those afflicted with this horrible illness that have shared their wisdom.
There are great books that also help put your feelings at ease, and although the sorrow and grief we all feel within this journey is nothing we can shoulder for each other, at least know this forum can be a place of respite for you.
You are not alone, new friend.....may you find some peace in the weeks to come with all that you will discover about this illness, and I hope for healing, wellness, and stability for your son and your family as you walk through your next steps in this.