Echoing similar sentiments, don't force yourself or feel guilt because you aren't sewing like you think you should be. It's all part of the process. Even with things that we absolutely love, sometimes too much of a good thing is just that, too much. Relax and search for another interest.
It will all be there when you get back to it. So don't worry yourself. When it happens you'll be whipping out projects like nobody's business.