Yikes, that sounds scary--the only advice I'd offer would be to contact your doc and tell him how bad you're feeling. Those appointments for imaging and further care might have to happen a lot sooner than Friday!
Please do reach out to your healthcare provider, and take a friend to be an advocate for you if possible. It's easier when you have someone else to add a voice, and especially if you're having trouble processing, etc.
Holding you in my thoughts, KTF. Keep us updated, OK?