I know exactly the feeling you describe and can actually sense it right now. It's somewhat like a rush of adrenaline where it becomes an obsessive thought that won't go away until you act on it, right? It's not crazy, but it is very INFJ. Our minds are forever working on many things at once, even on a subconscious level. So often what you are experiencing are ideas that have been in that subconscious "coming to the surface" so to speak. The INFJ mind is always trying to figure things out or create things, solve problems, etc. Since you typically have a schedule that you like to stick with because that feels healthy for you - what techniques have you tried thus far to counteract this mind switch not turning off? I assume you have tried things such as "mind switch" which would be intensely focusing on another topic that doesn't cause your brain to go into over-drive, something relaxing. Sometimes what works for people is getting out a pen and paper or your computer and just writing every thought and idea that comes to your mind about this "light bulb" idea so you can get it all out of your head and focus on something else for a bit. Lavender is also highly effective, believe it or not - whether you spray it on your pillow, around the room or soak in the sub with it (if you have one). You can also try laying down on the bed, closing your eyes and as your mind is racing, begin to take really deep breaths in gently in a soothing fashion and slowly exhale and literally cause your brain to focus on your breathing. This has a huge affect on the brain. Jotting your thoughts down first and then doing the breathing technique in combination together often works the best.