Natural reaction, just try not to beat yourself up over it. To paraphrase what another forumite said recently, look at it this way, you've only relapsed once in over a year. That's pretty awesome!

Addictions are hard to deal with. Just try to remember what you did to quit last time, and focus on those things. And while you have to deal with these current issues, try to break it up into manageable "chunks" so you don't get overwhelmed.

And remember, falling off the wagon is not the end of the world.