Hi, I hope by this time you already had an explanation of your MRI by your doctor or you just searched in internet. Sorry nobody answered you. I'm just recovering myself from a back surgery and I'm not every day now in this forum. To my understanding you probably had complications from your previous surgery. Sometimes discs can degenerate by aging and/or having injuries. It seems you have many bulging discs and most of the people with bulging or herniated discs have spinal stenosis, even with just one disc affected (my case). It's just inflammation caused by the bulging disc, most of cases pinching a nerve.
I had a non traumatic lumbar discectomy in the last disc of the spine, L5 S1 right side,affecting my sciatica nerve. I was handicapped over 3 months. Now little by little recovering. Walking around the house. So far so good. The day after surgery I didn't even need a vicodin, I had the next day and the third started with ibuprofen. My surgery was 12 days ago. Good luck to you!!