Bernadette If it is any consolation the way I felt prior to diagnosis in terms of panic and anxiety was probably the worst I felt in the whole process, it is the uncertainty and your brain working in overdrive as to what it might be. Once you know what you are up against you can deal with it. I would absolutely reinforce what others have said about having someone with you because you cannot possibly take everything in, in fact that is what your mind does to help you cope with these situations. Also remember even if it is Cancer, and it may well not be, there are many grades and manifestations, Cancer isn't just the Big C of people's fears , it is actually a lot of different illnesses. In fact there are some manifestations of Breast Cancer they are not sure would ever go on to cause you harm. I bet everyone of us on here had a different manifestation of BC, and other cancers. As Smee says we are evidence that there are treatments that work. Good luck!
smee NOOOO!!! When I was a twenty something I went for an assessment for a job and they fed back to me that I had scored in the bottom 2% of the population for a mental arithmetic test, it was one of those 100 questions in 5 mins things but in the top 2% for Analysis of trends (graphs and statistics), they were a bit puzzled but that is Dyslexia isn't it? I had a classic dyslexic career path, in marketing, cashing in on my creativity and ending up in strategy development, being able to see the big picture. I loved putting together models adorned with lots of numbers, but thankfully there were computers to work out 78! In fact when I was working with DDs on tables and the answer was fresh in my mind I fired 78 at friends at a dinner party, including a Head Of Equities in an investment bank and an FD and a couple of Mathematicians and no one but me could answer it 
My DDs have fared better because they now teach so many good strategies to help with mental arithmetic and that has helped me too, so things like 9 =10- the number. and going to the nearest bit of the table you do know and counting back or forwards. 7*8 is easy now I know I eat and eat til I was sick on the floor. It is great that they are now allowed to count on their fingers too. Hopefully DSs teachers can appreciate that this is the way they learn? DD1 has A in Maths at A2, and does Maths modules as part of her Science degree, but "the only problem is that she makes silly mistakes" was a bit of a refrain from her Maths teachers.....