It's true, days that I don't write are worse days.  Try writing.  Even just a sentence, even just as a way to let out your feelings.  Even if it is just for you to see and not for anyone else to see.  Trust me, it helps.  
I'm dealing with a problem with my wrists.  It started off with one, which is now wrapped in a bandage, and now my other one has been feeling it too.  That, along with my lower back and knee have experienced problems lately.