I can understand completely bc I experience the same thing. I am 11 mos out of surgery and I can tell you that the intense feeling of tightness and pressure has not gone away but it is a bit less intense at this point. I am remaining hopeful it will continue to improve. I am grateful I can walk without pain but if overdone, it will feel more tight for a couple more days.
If you find from spinal mri that there is a connection to what you and I are experiencing,,
I hope you will post for others consideration.
Peace and Blessings