Hi Nat 1977,
I'm so sorry you find yourself in this situation.
It's normal to worry while waiting for results, and I really don't think you need stress about the implications of worrying - unless you're resorting to unhealthy coping methods which I'm sure you're not.
You could make an appointment with the GP to discuss why the specialist thinks you may have cancer and at the same time, you could tell them how worried you are. You may feel better just telling them how scared you are - even writing on this site may make you feel better if you feel you don't have anyone to talk to. There's also the cancer counselling line.
Over the last 14 months, I have had many, many, many scary moments. It's been a long time since I enjoyed food and if you look at the time I'm writing, you can see I sleep badly too! How I managed with the worse times was to break time down into 60 second blocks. In that way if nothing bad happened, or if the sky was particularly blue etc etc, I could tell myself...that was a good minute!
I wish you all the very best.