You can do it and it's a good idea to do for yourself! Whether or not you leave them stranded, if you ever need it on your resume, ever need references, etc. and there's the "habit" you're starting. Some people don't go back and get in that habit so they quit jobs without notice and don't go back, etc. and it catches up with them eventually. I like to work on finishing what I start to the best of my ability. Do it for yourself, not for the Waffle House.