Unwrap it and red-do it so you have enough material to stuff in the ends. Whenever I start a wrap, I always check to see what it looks like before I continue on. One way to check is to start a wraps and stick the bar end plug in before you continue. That way if it looks weird, you can redo it until it looks right. Putting the plug in before your continue will also help those who feel like they need tape to hold it while they wrap.