What happens next?

How to handle a family members recent cancer diagnosis
Wait for all test results before worrying.
Doing this will ease the fear of the loved one you are supporting through this difficult time.
Reduce your own stress over the matter.
Keep your mind busy with things like work, reading, talking with friends (more on friends later ) Research, research, research. The internet is a wonderful resource when used properly, but remember not to take what you read as the absolute truth.