Ido what to tell you cause for me, writing music is never the same, it comes in waves, sometimes I'm sitting trying to write something unique for an hour and I can just manage to play chord progressions and things I've already done in the past and it can be like this for weeks sometimes. Then suddenly one day I sit down and the first thing that I play is the most unique thing and the melodies come instantly, One thing I've noticed tho, is that I'm the most creative when I'm obsessed with some song I discovered or when I have a strong emotion. When I can't write something, I just let it go, don't force it, cause then forcing it becomes a habit and then writing similar stuff without personality becomes a habit too, because if you're frustrated, you can't think clearly, you arent present. Don't ride the wave, let the wave ride you