Silly girl! I can't even write a complete story! I've never gotten the time to even finish chapter two of my story but you've got that frame of mind to write more than one chapter. It seems like you have a plan for each of your stories, while I'm going headless and don't have one clue what I'm doing. Like gucci said, practice does make perfect.
If you don't feel like writing for awhile don't force yourself to, but you don't have to leave. You could just read stories and review and "hang" with us until you get the inspiration you need.