For a month, when I wake up my knuckles/fingers are REALLY stiff. When I open and close my hands the knuckles pop in and out of their sockets but no pain. It slightly eases as the day goes on. I also have achy thumb on and off throughout day. I've been to docs and she said she thinks I'm too young for arthritis an doesn't seem to know what it is. I'm 34. Anyone relate? Is it anything to worry about?