A Blue Orb

Hi everyone, I'm new here :)

I've been wondering about a strange thing I see for almost a year, and finally decided to check where does it come from.

After my dog past away last year (I was very connected to him, I nursed him 24/7 during his final year and loved him more than I can express), I started seeing a blue orb randomly, mostly in my room when I'm alone, on the upper left side.

At first I thought I was having eye problems, but then I had like a gut feeling that this "orb" is actually my dog, and that's his way of telling me that he's still with me.

I wanted to check with you how crazy my theory sounds, and if you know of this phenomena.

Thank you!