You can try setting your goals lower for now, maybe just publish a smaller part of the application that has a more fun and experimental vibe.
If you've got burn out definitely get some medicine for it and make some changes in your life, try adrenaline regulating vitamins with licorice and stuff, take some brain fuel vitamins, try some gaba (it's like magic). But there is nothing better to beat stress than productivity and feeling like you've provided something, so ship something.
Generally the answer is to feel more empowered, by changing the stress equation: stress = resources vs desires. Get some more resources by talking more to colleagues that you can work with, find more people / customers that you can serve (reduces your desires they have lesser needs, which you can meet now), or just step down your own aims to something more reasonable, maybe it's not as risky to just ship what you've got.
The rule of thumb I like most is to continuously make sure (every week) that you're making some achievement that involves interaction with people, as in you're providing value.
I tried to ask a similar question here a while back but it disappeared http://news.ycombinator.com/item?id=2331889.