Trailgranny. I lost my wife in 1993 I thought it was the end as well. I did not sell anything right away. After a few years I found great solace in revisiting the memories in person.
I met a lady who is wonderful and we have again revisited those places and made them ours. I now have 3 great memories of those places. Please go slowly in disposing of your things. Three weeks is to short a time to make those major decisions.
Please read about the stages of grief. Until you reach the acceptance stage your decisions may not be the best long term
Traveling with my best friend, my wife in a 1990 Southwind