Fibro-fatique or depression?

I am so frustrated.  I am feeling really down, and mentally and physically depressed.  I have been for a few weeks.  I don't know how much is mental and how much is physical.  I feel so beat down and exhausted and that I just want to curl up in a ball and sleep. I don't even have to sleep...just curl up in a ball.  My agoraphobia is also in full swing.  It's like these three things (depressions, fibromyalgia, and agoraphobia) are trying to kill me by causing all my body processes to shut down slowly. I feel like if I could figure out how much of the way I'm feeling relates to each of the components I could make some sort of headway towards healing.
I don't know where to start, I don't know what to do.  I am  not even going through the motions anymore.  I am relying on my family more and more to pick up my slack.  It's not fair to them.  I need  help getting going.  I need help learning to be independent.  I am 48 years old, I shouldn't need someone to be with me every time I go outside of my house, or even outside of my room.  I feel like I need someone to help me even cross the room.  It's as if there is a weight dragging me down and anchoring me to  the spot I am at. 
If you have any ideas of how to get through this, please, feel free to comment!