I was having lower back problems so I went to the Lazy Boy store. I found a recliner with back support and several height adjustments for your feet. This is my lifesaver chair. It keeps my spine in place.
I also now walk 30 minutes every day.
I use an adjustible computer chair as my sewing chair also.
Have you checked out those machines that you turn upside down in? those should stretch your spine. They sell for 99 dollars and anything that keeps you from cripling back pain is worth any price.