How soon will I get my results from MRI?

I finally had my MRI scan of my head and now the wait begins for my results. Does anyone know how quickly results will come in if it turns out to be cancer? I asked them when I will recieve the results and they said they can't give me an answer, but it could be up to 6 weeks! I dont think my anxiety can take 6 weeks of waiting to find out if I have a tumor.