Ooh writers block is definitely nasty, but I might have a couple of things that’ll work for you!
For me, personally, if I can’t think of anything to write, I’ll try being creative in a different way. I’ll play piano or guitar or just doodle for a while.
Another thing that helps is a trick my English teacher taught me. Get up. Grad a pen and some paper. Go for a walk. Find 3 objects with nothing in common. First, describe each of them individually. Then combine all of those objects together to create a new object. Then write a quick story about your new object. It’s incredibly silly, but it pushes you to be creative.