You gave the key when you said sitting & resting after a period of a month or so of increased forces on the posterior elements of your spine. The tingling or paraesthesia is caused, almost always, by nerve compression close to where the nerves exit your spine en route to the muscles etc. Now what could the structures involved be? The model of the disc fit very well with the research but call I what you will, the response to force, pressure, & movement will be the same.
If you sit long enough, particularly over time, the structures restraining the inner disc gts sretched and allows just enough movement to allow a blip t contact the exiting nerve.
I'll bet the times you feel tingling are in sitting, bending, or shortly after sitting. Try lying on your stomachi there is no increase n symptoms and then try the downward dog yoga movement 5-10 times. Then assess your Sx. It is a ruling in/out process. IF you begin to notice a positive change repeat every 2-3 hours in standing ( backbends ) or on your stomach.
If sitting produces your Sx then do not bend to touch your toes or bring your knees up to your chest. Why? It is the same position as how you think you got here in the first place. Do not sit in a soft easy chair without support an for no longer tha 30-45 min for a day or two.
Your Sx are classic and from the sounds of It not medieval et.
This software doesn't work too well with WORD. Homework: Look up McKenzieMDT.org - not case sensitive. Read it and tell me what you think and how you responded within 24 hrs