Naked finger

I don't know what it is... It's been months since I wore a wedding ring yet I can still feel its absence on my finger. Driving to work I'll feel like I missed putting on my jewelry in the morning only to realize I put on my watch and earings...and I don't wear a ring any more. Lately I've noticed myself feeling my ring finger with my thumb as if checking to see if the ring is in place. I still glance at my left hand and think I'm missing something. Weird...