Your starter looks like mine and me too my starter did not rise , and I think I did a great job with my first loaf of bread. I made my preferment on Tuesday, let it ferment on the counter for 48 hours, and life being what it is, I couldn’t bake as planned on Thursday night. So I put my preferment in the fridge, as Shari said. I took it out on Friday to let it come to room temperature before making my bread. So all this to say that it should be fine. Can’twait to see your result