Sorry to hear about your situation. You may want to look into VA benefits that your father was entitled to for serving. There may be assistance available for you. Doesn't hurt to look.
im really sorry to hear about your situation... There is great help out there, my sister is in that field. She absolutly loves her job and the ones she works with.
I'm sorry man, you have my deepest sympathies. My dad sat us down on sunday and told us similar news about him. I knew it was coming, but its not the same as knowing and feeling it in your gut.