Your arm just may be super-bruised deep inside from the blow-out you had.  OW.  Mine did that some since I am an easy bruiser.
Are you?  Definitely tell your Dr.
Arnica Gel or ointment is WONDERFUL for bruises.  - Of course, ask your Doc before taking anything.  

TYLENOL?!?!  Good Gosh, that's wonderful!  Two weeks out I was jogging on my treadmill.  NOT the best idea, but I was crazed from lack of movement.  LOL!  I took stuff to help sleep since I am an insomniac and the ONLY way to heal is to REST.  I was on pretty strong meds for a bit longer than you, too, but that could be attributed to my going back to work (at home) and doing things I should not have.  
So, bottom line:  Take it easy.  

  I think you already know what you are doing though, so just keep it up!
Keep me updated, I'd love to know how you progress.
Are you feeling that conquer-the-world feeling?  I did!  It's wonderful.  I still get it, even though I unfortunately have BAD migraine days.  I figure if I can get through AN surgery, I can do most anything.  

Wow, I can tell by the rambling nature of this post I did not sleep much last night.  I apologize.  heehee