Jenn,
I am sorry to hear about your cancer, but am so glad you found the site. It is a wealth of knowledge and compassion in a time when you need both. When you go to your new Doc, may I suggest you voice your concerns and tell him about your Mom. Ask if he will do further CT studies to rule out metastasis (Actually, if he will order it, a head, neck, chest, abdomen and pelvis CT only takes about 10 minutes longer than just one of the above!) This way, your mind will be at ease that you aren't missing something you can treat.
Wishing you the best of luck with this, keep us posted on how things go.
Andrea