The first two cases really require turning off my internal editor, calming down, and figuring out what I want to say right at that moment. They may require I take a long walk to get to that place. I start asking myself questions like what subjects feel important to me right now, what stories do I want to tell?
Instead of pushing away the hard stuff, try running toward it. Use it. Exploit it. It has the power to stop creativity, so it might as well be used to restart it. Make things for yourself to get through difficulties. Destroy them if you must, but they may well be the strongest work you do.
Here is a beginning project to get your hands going and your unconscious working. It's about process, not product, so any kind of paper or thread can be used for this very basic single signature (also called pamphlet stitch) book. You can find it and its variations in Making Handmade Books on page 95.
Stack the papers so they nest, one inside the next.
Sew to one of the other holes.
Tie the two threads in a square knot. Trim the ends, if desired.
Make many of these pamphlets in different colors. Attack the book with a hole punch, if you like.
By keeping your hands busy you may think of new ideas for other books.