Thank you for posting your query with us.
Well the pain that moves from the low back and to the upper back and shoulders can be mechanical in nature. If you have a lot of stress
at home or at work then you need to take some days off.
Go to a good physical therapist who would assess the strength of your lower back and your shoulder muscles. A good exercise regimen to strengthen the muscles will help ease off the pain.
Take a muscle relaxant
for a week or so and do hot water fomentation on the painful area.
Also at times, such pains are due to deficiency of Vitamin D3
or calcium so get these levels checked in your blood and if a deficiency comes out then visit an orthopedic who would prescribe you some supplements to make up for the loss.
Till then, maintain a good posture, start exercising, decrease the level of stresses and eat a healthy diet to stay fit.
Get well soon!!!