I know where you're coming from. I've had similar anxiety/depression/procrastination attacks, not quite as severe as yours sound, but I can relate.
If it's at all like what I was going through (and many creative types as well) you're putting too much pressure on yourself. You look at other animation work and think, "I can do that." You're thinking you have to come up with that idea that will win major awards, get you a top job someplace, and people will climbing over each other to buy your next idea.
But what ends up happening is that you sit down, start to draw, animate, or write and within 15 minutes you think, "This is crap, if it's going to win awards it has to be perfect." You throw out what you've done, start working again, and start to think, "I wonder what's on TV?", "Does Zelda need rescuing again?" or "Have they updated my favorite porn site?" And before you know it another day has gone by with you having nothing to show for it except a bunch of frustration that leads to depression and more pressure to make up for it tomorrow.
Am I right? That's happened to me quite a bit. I've found a couple tools to fix it and I'll gladly sell them to you for the low price of . . . Just kidding. Here's what you do.
Start small. Doodle. Work on stuff that doesn't matter. Make sketches. Draw a walk cycle for nothing. If it sucks, who cares, it doesn't matter. Force yourself to do one short drawing, animation, page of writing, etc. a day. Keep it simple. A ball bouncing or rolling. A box turning around. A simple walk cycle. Try not to perfect it. They're just sketches. Avoid the eraser. If you're writing, use a typewriter without a correction tape.
Disconnect from the internet. Turn off the TV and radio. Work quietly at first. I'd recommend trying it without music, it's hard at first but really helps your concentration. If you feel you NEED music, find something without words, classical is usually a good choice. Unplug from the internet. It can be VERY distracting.
Work for an hour, or half an hour at first. Start small. If you want to work longer fine. But aim for a specific, short amount of time. Don't have any goal in mind other than you are drawing for an hour. Don't judge it until the next day. Just let yourself be satisfied with having done something today.
If you miss a day, don't worry and don't try to make it up by working 2 hours the next day. That won't work. Just forget about it and try to work on it tonight. Remember, no pressure. As soon as you start pressuring yourself the procrastination is going to kick in. A little pressure is good, just don't make it a "I have to or else" situation. You're just trying to train yourself to regularly work on something that's important to you.
Your work will probably stink at first. Mine did (still does). But it will get easier. It will become fun. You'll find yourself wanting to do it. Sometimes you won't want to, but force yourself to sit down for one hour. I'm always surprised to find myself not wanting to start, then not wanting to stop as I go on. I'm starting to prefer working on my animations more than watching TV or playing video games.
I'm getting faster and it's becoming rewarding. I'm beginning to be able to put up on the screen what I had been envisioning. I want to do it all the time now and that overwhelming pressure to perform has been replaced by actually performing.
Here's my page with my evening animations.
http://www.galaxy12.com/latenight/
I have more animations to put up, but you'll get the idea. I've only been doing it for a week and a half now, and I already have more to show for it than the past year of struggling to find the perfect idea. I'm also feeling more creative and less frustrated than I have in a very long time.
Here's another site that inspired me to start doing this.
http://internalcow.tripod.com/
Nice, sketchy, and not too much time invested into any one drawing. It's still higher quality than my stuff at the moment, but I can feel myself heading there.
And definitly keep talking to your doctor. Tell him everything you've told us. If he can't help with the laziness/procrastination perhaps you should look for another doctor who can. Don't give up until they get your meds and treatment straightened out.
Oh, and get enough sleep. I always have a harder time dealing with life if I don't get enough sleep. You really aren't missing that much if you go to bed at a reasonable time (you're missing more if you're walking around like a zombie all day).
I know there's a lot in here, but I've had a much better attitude towards things since I've started thinking like this. I hope it helps.
Hang in there as best you can, things generally work out eventually.
