Hi Wino,
I started off miserable. I kept a diary and looking back it's obvious how miserable I was, then my mood really started lifting, slowly but surely, from about week three onwards. It might be worth considering a diary so you can see improvements as they happen.
I think it's tough because you hope to feel much better really quickly, and for me that wasn't the case.
Eight months on, though, and I'm happy and content.