Thanks for reaching out, the forums are a great place to be able to chat with other people that have shared similar experiences with you. I have been where you are, and depression can really make dealing with deadlines and other daily tasks really difficult. Its hard to find the motivation to do anything when your mood is really low.
What worked for me was having a great GP who listened and worked with me on what I needed. I was able to get on some medication (which doesn't work for everyone) that stabilised my moods and helped me sleep better. That helped me focus during the day and I was able to get back on track. But more importantly, at the same time I was able to link in to some therapy that helped me sort out my underlying thought patterns and feelings of inadequacy. Over time I was able to slowly come of the medications and learn other techniques to deal with the hard days, which luckily I don't have many of these days.
I would recommend seeking help from a GP and maybe getting a referral to a therapist who you can work through some of the issues with. Talking her on the forums is great and we are always willing to help you anyway we can, but often talking to a professional support network will really get you on the right path.
Beyond blue has some great resources you should check out about depression, and they are available for a chat if you need either by calling any time on 1300 22 4636 or through Webchat 3pm-12am AEST at: www.beyondblue.org.au/getsupport.
Hopefully you make use of these resources, or getting in touch with your GP, but even if you do, drop back in here on the forums and let us know how you are doing, you aren't alone and we are here for you when you need someone to chat to.