Hello Robairlb,
Just a few important words - LISTEN TO YOUR BODY AND MIND!!!!
Robairlb, do listen to your body and what your mind says. Only upi know. That's not me just talking, that's my doctor and my physical therapist. How many times has my PM doctor told me that when my body doesn't like something I am doing to it to STOP. Several times. How many times has my physical therapist told me "Now if it hurts, let me know and I will stop. Many times.
YES, exercise IS important. If I don't move, then my back gets sore and the pain starts in. BUT, there is that line. Pushing onesself TOO much is not good. Most of us have "crossed over that line" and paid for it.
I am a big believer in following the doctor's advice, but also if what he tells me to do for exercise hurts, then I call him up. Also if he prescribes a medication that I react adversely to I call him up.
I am also a big believer in physical therapy. What they do and have you do can REALLY make a positive difference. Yes, I can feel the stretching feelings, I can feel that I really have to work at lifting some weights, but as soon as my body says "Im in pain", I stop.
Walking is good, but follow your doctor's advice on what you should do and not do. But when the pain starts in, then it is time to stop and give your doctor a call.
About sitting for long periods of time - THAT is a NO NO for those of us with back pain. Wood chairs/uncomfortable chairs are a NO NO for my back. When we go to a restaurant that has comfortable cusioned chairs I still take my GREAT form fitting cushion with me. It really helps, but even then I may have to get up and go for a short walk to "loosen up".
From what you have shared with us, it would seem best that you not go back to work at this time. AND when you do go back to work, tell your manager that you will need to start with just half days, AND that you will need to take several breaks to walk around and loosen up a bit.
Sorry this is so long. I do understand what you are saying, and wanted to make sure you know that I have been there.
Take care, hope things get better for you.
RichT