When should I wrap up an injured hand?

Two days ago, I woke up and started about my day... only to notice that my hand, kind of around the base of the thumb, was a little sore when I used it. I went to work... remained puzzled about the dull pain but carried on with work.

The next morning (yesterday), I woke up and that minor pain had become uncomfortable:: to the extent that I didn't want to even move my thumb at all. opening doors or jars, turning my keys in the ignition:: very simple tasks:: we (and still are) are painful. Sometimes a duller pain occurs in my forearm and wrist.

Yesterday afternoon, I wrapped my thumb (hand and wrist) in an ace bandage making sure my thumb was secure against the side of my hand. This pain is unexplainable to me:: I have no idea where it came from. I'm a healthy 26 year old female.

Any advice would help... the ace bandage doesn't seem to help.