Jamie,
I am so sorry this is happening. Please know that there is a great deal of hope that things will improve once the doctors have had a chance to fight the cancer. Hang in there. In the interim, it is important that you eat and sleep so make sure you get some help and support if you need it, either through medication (many here will offer advice on that and your doc will have suggestions) and through this group and family support groups in your community. Please don't try to internalize this on your own.
Lisa