Hello & Welcome, Nanatimesnine! Here are a few links -- maybe there's something in there you haven't already tried or encountered:

PC Holiday Coping Resources

Coping with the Holidays Guide PC Special Report (links)
Holiday Stress: A Resourceful Survivor’s Guide By Sherrie Mcgregor, Ph.D.
Coping with Thanksgiving PC Special Report (links)
Alone During the Holidays? Join the Crowd By Laurie Stoneham
Holiday Traditions By Marie Hartwell-Walker, Ed.D.
Family Stress at the Holidays, Part 1 By Erika Krull, MS, LMHP
Family Stress at the Holidays, Part 2
Holiday Stress Survival Tips By Christy Matta, MA