I understand totally how you feel, but you have to remember, the most impertant person in the world, is yourself, because if you don't look after yourself, you can't look after your dependants, ie, your son.
Forget everyone who is worse off than you, if you can't help them, there's no point in worrying about them, a good start, is to not read any newspapers, or watch the tv news, (so depressing in itself) I know thats hard, but do try.
Apart from that, I won't give you any advice, the above posts have given you plenty.
I really wish you well for the future, and hope things work out. 'L'