Has Missing Cleo made me paranoid?

Its over a month now, I don't like it, but I am getting used to waking up with no cat at the end of the bed waiting to welcome me to a new day.

Today I came home from work and noticed that Stu does not seemed to have eaten or used his litter box. Cant be sure cause I just did a minimal cleaning yesterday. So today changed the litter and the blanket that he has under the lazy boy and all of the towels that he nests in. Got out the vacuum and sucked up any poops hiding in corners or crevices, if any new ones are made I will know. He ate all the treats that I hand fed him, dill, parsley and carrot top with a chunk of carrot still attached, but no water and no hay.

I have the same feeling in the pit of my stomach that I had when Cleo started failing. I am praying that I am just being paranoid and that tomorrow I will wake up and have to fill up all his bowls before I leave for work.