Okay don't panic! Could be they need to do a follow up appt or just have some questions for you. Have you been there recently for some testing? Lab work? Why do doctor's office do that? If they really needed to talk to you - you think they would leave an emergency number. Any way you can leave a mssg with an answering service? This way your mind will be at ease if you can talk to someone tonight. Let us know what happens.