I actually think it would be impossible to know now how you personally would feel. I image you would have a variety of thoughts flooding through your brain and feel very anxious about the future and your families future. 

I would expect to begin to mourn myself and think about all the things I am about to loose, my independence my dignity, my freedom of choice, my financial stability. I would be concerned about the burden facing my family.

Scared about how my journey will look, will I be in pain, how long much longer will I able able to walk, talk and breath indepandantly for. 

Will my friends and family treat me the same

I imagine, I would feel very frustrated by the lack of control I had over my future, angry at times and question why me, feel its unfair and try to make logical sense out of something that is completely random.