I don't think you are in trouble at all. You are an angel. I can think of no way that your customer can possibly be upset. Tell her what you did when she picks it up, but only because that maybe next time she won't bring the same problems. Tell her that you just went ahead and took care of it, and you hope she doesn't mind. If she does...well, there is just something wrong with her. What you did is what she should have done before she brought it to you...and if she is having health problems, she probably did the best she could at the time.
Dina