How to deal with this?

Hi, I'm new here and have a problem with my mom. She has been very depressed for some time now but it seem's to be getting worse day by day. Believe it or not it started almost 11 years ago when my dad died suddenly (he was 53). She was put on Zoloft for a little while but then came off of it. My brother moved out about a year ago so now she is by herself. She work's part time about 4 hours a day, she's 62. about 2 weeks ago she started on Wellbutrin and so far she say's it's not making her sick like all the others. She has tried a few, I guess she gets disgusted and gives up on them. She's in the "process" of finding a psycologist. She was in grief counseling in the very begining but I don't know if it helped. What scares me the most is she's down to 108lbs, and she's really not eating. I told her she's going to end up in the hospital if she keeps it up. I just don't know what to do or how to help anymore. She doesn't talk to me, but she'll talk to my husband more. He's more calm and patient. I guess that's my problem. I've been dealing with my own issues too. I've been suffering from migraines for the past 16 years and been on Topamax which seems to help and Imitrex when it doesn't. There's been alot of times through my life when you just feel like giving up, but I don't. I pull myself together and always try to think it could always be much worse. I know it's scarey for her trying to take that first step to see someone to talk to, but how do I help? What can I do before she does end up in a really bad place? I have no family except for her and my husband who is a wonderful man.
I've been reading alot on this forum for the past few days and it's seems that there are alot of great people here. To be honest, it took me a few to put up this post for some help, guess I was scared too.
Thanks for listening...
Dee

Hi Hopefulmigrainer, thanks for your reply. Today she made the appointment with the psychologist! She goes on Wednesday. I'm really happy about that. Today was a rough day. She rescued a dog about 2 months ago and feels she's no longer able to care for this dog. We have always had a dog in the family, so this isn't the first. I felt by her getting a dog it would help and make things a little better, but it's seems to be making things worse. She feels like she can't take care of herself so how can she take care of anything else. I'm trying to tell her not to make any decisions just yet, but we'll see. The other day she called me at work crying and told me she thinks shes having a nervous breakdown. I just don't know anymore. She doesn't belong to a church or anything for that matter. She goes to work and comes home and thats it. We used to go out to eat or shopping and we don't even do that anymore.
You are right about my migraines and how I feel. Crappy. I've been taking more Imitrex which I really don't like cause it kills my stomach. I've tried all the others and they don't seem to work. I was on Elavil for years but came off of it to go on Topamax which is a help but still get migraines which I know are just from stress.
Thanks again, I guess it's just one day at a time....

That was what I was hoping for with this dog. Kinda of a reason to get out of bed in the morning and go for walks and things like that, but it's going the wrong way. I really was her to keep him, but that decision is hers to make but I feel she wants me to make it for her and I can't. I really hope she likes this doctor on Wednesday.
Today was not a good day for me, I cried alot and I think that brought on a really bad migraine. So far took an Imitrex and no relief yet. Really feeling bad. It's hard not to when your own mom doesn't talk to you and say's things to you like you don't support me and you always push me into things. I feel I have done nothing but been there for her. Always asking to go to the doctor, trying to talk and I feel like this is what I get. It's starting to get me very down again too. I feel almost feel worthless. You can't really talk to any friends about this, they tell me to back off for a while because they see what it's doing to me. But how can I do that, she's my mom?