Hi Denise. My diagnosis was five days before yours, and although it is different cancer I am willing to bet I've been experiencing the same emotions and feelings as you. I can sure relate to the change of perspective and the worry. For the first week and a half I couldn't go more than 15 minutes without thinking "holy crap, I have cancer".
I can tell you that every test I've had (biopsy, CT scan, PET) has increased my level of knowledge and sense that I can overcome this. So I hope your own confidence improves the way mine has. The folks here have been really supportive and the information you can find in past threads is invaluable. Good luck to you with your battle.