My mother in law has just phoned me to tell me that they think my niece has measles. Me and DH babysat for her on Sunday Night (it is now Friday). Should I be panicking? I am seeing the midwife on Monday and will obviously tell her. When I had my blood test back a couple of weeks ago , the only thing detected was the fact that I am rhesus negative - would it say if I wasn't immune to measles? HELP PLEASE!!!!