Hello Ladies,
I've suffered from Anxiety but been treated for depression for the last 2 years. Like Momof4under5 I don't think it was at all my choice to be that way.
It was a downward spiral - until one day I just couldn't function anymore.
The thing about anxiety or depression or a combo of both is that I think initially you can CHOSE to stop it dead in its tracks. Unfortunately, by the time you realize that it is depression it's often too late.
Thankfully, I got treatment. I sought help because I didn't even feel like myself anymore. It was my body with some strangers mind. It's VERY VERY VERY scary.
As for weight and depression. I do think that by replacing those depressive, repetitive thoughts with the will and motivation to lose weight can be very beneficial.
In my case, I suffer from Anxiety so I tend to dwell on things in unrealistic ways. Since I've set my mind to losing weight i haven't had the time to worry like I did before! It's given me a new "thing" to dwell on and in this case it's my weight loss journey.

Best of luck to you both