Sorry to hear you're feeling so bad, and I'm sure the weather doesn't help. I know that when I eat better, I feel better, and I've been feeling a lot more "grounded" or stable since I started taking B12. But if you've got serious depression, just eating well is probably not enough. I don't know if you're seeing a counsellor or anything (can be hard with little $$), but I think that's important. This year for the first time I found a counsellor who is actually helpful, and it's been great. I know that when I was in high school I got to see someone for free through the Health department in New Brunswick, I would guess that NS has a similar program. The eating better is really good, I find that just the fact that you're caring for yourself is helpful, but it's probably not going to turn everything around by itself. Also, a week is a pretty short time.
take care of yourself. and your meal choices yesterday sounded awesome.