Waiting for results - extremely anxious

Hi all, after finding a breast lump I went for my appointment on Wednesday and they told me after the mammogram u/s and biopsies that it's highly likely I will hear I have cancer when I get my results. I'm just imagining the absolute worst case scenarios all the time and I'm becoming convinced that the cancer is all over my body and that every cough or headache is a symptom. The scan on my lymph nodes looks clear so I'm trying to cling to the that but I keep getting myself in a state of terror. Is this reaction how most people feel? I don't know how I can last another week waiting. 
 

thanks for listening

 

gayle x