"Groundhog day effect" is a great way to describe it.
@BiggyRat gave some good advice to break up the monotony but I can see where you are coming from.
I've always found reading to be incredibly soothing. I love reading, especially fantasy novels where it offers a complete, immersive escape for a few hours. Getting lost in a good book often give me something to look forward to when I wake up, knowing that there is still an adventure happening that I can be a part of (bit sad, right? haha). You may not enjoy reading but there will be something out there that can give you something to break that "groundhog day effect", even if it's just reading a chapter every morning, or the new Game of Thrones episode etc.
Hope you feel better soon mate.
Fantastic advice there mate. I find reading very calming too, as if you're enjoying it you aren't thinking about all those things that are worrying you. I also find a good box set has the same effect, even if the content is a big tasty !