Eileen!
It's going to be ok dear. Breath...in and then out and know that you'll get through it. What you should take away from the survivors on these forums..is that others have walked the path that you are on and are alive and helping others just starting down it.
Talk to your Dr. about antianxiety meds, or score some medical marijuana and vaporize the hell out of it. Soon your anxiety will fade to giggles and the need for Doritos, donughts, Snickers and beef jerky...oh and another favorite of mine was gummi worms.

Keep your chin up, you got this
Eric