Hey Ano,
I hope Shabbos painted some simcha back in there! I'm a newbie so to me Day 29 is quite a serious accomplishment! Keep it up!
I too get the occasional "I'm depressed and have no idea why..." thing. So many of us are holding in so much, possibly repressing a lot as well, and definitely living under the stress of the secret lives our addiction brings us to, that it is a wonder that we only get that occasionally!!! I find that when I get that, just getting more active snaps me out of it (somewhat).
All the best,
HAba