Someone very wise once said:
"I AM NO LONGER A VICTIM. I AM A SURVIVOR! AND I HAVE THE POWER TO MAKE POSITIVE CHOICES. AND NO LONGER BE PREY TO THE INFLUENCES OF MY PAST. " (She's wiser than she knows)

Bad days are ok. You really haven't done anything wrong (to my knowledge). Beth, you can make mistakes. It is ok! It is expected! Caring for others leaves you open to hurt and thats the one thing that stinks. However, most of the time that caring pays off. You're a great person. Write that down and read that every day. You're one in a million.