I had a nap on the couch today with my sick son for a couple of hours
and my son was resting on my arm and my wrist was slightly bent back.
When I moved it, it was stiff and sore.  In the past few hours it's
become a little immoble (but not too bad, just bad enough to hurt
while typing and moving wrist up and down) and there is a bump
developing near the hand to arm joint (on the side of my pinky finger
- where there is a small round bone).  There is no redness.

Is this a sprain of a wrist ligament?  Should I go to the DR right
away, or wait a couple of days to see if the bump goes down?  I've
read a brace may be necessary to prevent further injury - but I don't
want to jump the gun and be a big baby about a sore wrist.  Advice?

Thanks!
Paula