As a parent your completely wrapped up in your childs illness and treatment.
But you need to remember the person that is the most important to your child.
Take advantage of the resources available to you. Your childs doctor or nurse may suggest groups or orginazations in your local area. Don't be afraid to say, "I need help".
Keep a small notebook with you, write the things you need answers to down. In times of stress we all tend to forget these type of things. That's perfectly normal.
The internet is a wonderful resource, use it to your advantage.