I can't really add anything new, but want to second what everyone else has said! There is a reason this is called a "family disease".. it takes a tremendous toll on everyone! It sounds like your mom might have some cognitive involvement... there are several of us on this forum that are facing similar issues, and it just adds another layer of complexity and difficulty to an already complex and difficult issue.
Other suggestions for finding help... if your mom belongs to a church, contact them..let them know what's up. There WILL be people who want to help. Don't be afraid to tell people of your mom's condition.. you have to allow folks in a little.. they can't offer to help if they don't know there's an issue! One thing someone suggested to me early on is make a list of what you need: an occasional meal brought over, someone to stay with your mom so you can get a break, maybe help with the housework. When someone says "What can I do?" pull out your list and let them see it. People will surprise you when given the chance!
Hang in there.. and above all, list to Glen and AL and follow up with the
ALS Society... they are there to help!