I wouldn't worry about it. You might even find you've improved when you get back. If you've been playing steadily for a long time, you might even have gotten into a rut without knowing it. (happens to me all the time, so I often don't touch the guitar for weeks at a time)
Instead, use your time to listen to some other artists and come up with stuff in your head. Read up on other aspects of audio like recording techniques, studios etc.. expand your knowledge. When you get back, you'll have a totally fresh perspective on things.