@rfh1957, wise counsel to plan carefully for your visit - control what you can control. And for the things that you can't control or may go slightly differently than planned, focus on the present. You see to have well test coping mechanisms to manage your fears.

For the question "will I be bored and lonely over the weekend"? I have a thought. Have you ever used Mayo Clinic's Concierge Services? It's a free service and may be able to give you ideas of things to do on the weekend. There might be interesting tours or self-directed activities you could do.

Here is information for Contacting the Concierge Services:
– In person: Concierge Services desk
Mayo Building (lobby level, in the International Center)
Monday-Friday: 8 a.m. to 5 p.m.
No appointment necessary
By phone 7 a.m. to 6 p.m., Monday-Friday: 507-538-8438
Email: concierge@mayo.edu

The Concierge services are physically located in Rochester, MN, but they can answer questions about any of the locations.
https://www.mayoclinic.org/patient-visitor-guide/minnesota/concierge-services
Do you usually go to Mayo Clinic on your own?