Appointment letter

Hi

I went to the Breast Clinic on 5 November where I had biopsies and told they were highly suspicious I had cancer. I am currently waiting for my results and was told by the breast nurse that I will hear within 2 weeks 

However today I received a letter to say I have an appointment booked for 30 November which will actually be 3.5 weeks. 

Do you think this might be a standard letter that has been sent before they knew my results and that they might call before. I really don't know if I can wait until then! 

I called the clinic and left a message as no answer.

Thanks x