Whew! I never believed in writer's block, until it happened to me when my hubby was hospitalized and almost died. He was so much on my mind, I couldn't work on my writing and in fact felt like never again writing. The passion was gone. What did I do? I wrote in my journal, pouring out my heart and my insights onto the page. And when the president of our writing group gave an assignment that would lead to a novel, I took part.
Various forms of writing exist, which can help with the writer's block. It's what you call, a change of pace. Sometimes it is writing letters, or a book review, or an article, or a journal, or poetry. This isn't to say you should drive yourself mercilessly to bleed a certain number of words onto a page for a fixed time. But take your time. Take a break. Do the dishes. Pull weeds. Go for a hike. Sing. Weep. Play games. Then come back to writing.
What if I had never kept writing in some other form? Would my passion have returned? I don't know. But after four or so years, it crept back like a shy seedling and is again in bloom.