Don't worry too much about that happening. Your brain will let you know. I once went for four years without doing much of anything, and I would have dreams where I was writing or drawing. I mean, observing myself writing or drawing. That was my brain telling me, "You need to start your projects again."

I did. Now, a few years later, I've started two webcomics and I'm planning and writing a few stories. I have other ideas for projects, but I'm trying not to overwhelm myself; overloading is another way to halt creativity.