I know you are worried (your first child?), but please take into consideration that #1, this may have nothing to do with the vaccine. You should have taken her in to see the doctor. He can't diagnose her over the phone. If you called the nurse and told her that your daughter had gotten the shot a week before and is this normal... then you have put two and two together for the nurse. I'm not saying that she made the right call about telling you that your DAUGHTER'S case is normal (she might be right about this being a side effect in some kids after the MMR - not my kids, btw). What she should have told you is to come in and check to make sure that there wasn't something else going on.
Number 2, please remember that a fever for a short period of time is NOTHING compared to getting mumps (which hurt OH so much!), measles or rubella. These diseases cause so much havoc in society. A pregnant woman exposed to an infected child can lose her pregnancy or the baby can be severely deformed. Children die from measles. It's scary stuff.
When you are focusing on the here and now, don't forget to focus on the future and what the ultimate goal is - your child never catching these diseases.