This might sound wacky, but draw a picture of how you want your music to sound, or how you want an individual song to sound. That simple little thing helped me get out of a massive creative rut (as well as stopping my use of LSDJ, which I felt was holding me back). If this is an issue that's really bothering you to a point where it's creating real distress in your life, go to a therapist if you have health care. This helps a ton too, and it doesn't mean you're crazy. It will often put into perspective the reasons why you make music in the first place.
Also, instead of just sitting down in front of a tracker every time you brainstorm a new song, sit down in front of a pencil and paper. I noticed that the ideas really started to flow once I got back into school, not just because I was more mentally stimulated overall, but because I needed something to occupy my mind with while sitting through boring lectures. This also helps if you have a general idea for a track, and not enough time or mental bandwidth to implement it all at once.
Don't stress about it. The moment I stopped enjoying making music was the moment when I stopped writing worthwhile music. If that means you're done for a while, then so be it.
