I struggled with back pain for over 20 years before ending up in surgery. I've had back surgery & neck surgery. I had a disc rupture in lower back. 3 years later it shifted. It end up "L" shaped. It was pressing on the nerve, which sent level 10 pain down both legs to toes. I also had massive muscle spasms all the way to my toes. When the disc shifted the 2nd time it shifted my whole spine & blew a disc in my neck. That one ended up pressing on my spinal cord. My hands shook so bad I couldn't hold a pen to write. It had to be removed & a metal cage inserted. I also have 3 other bad discs in my neck. The disc in my back they didn't remove, but trimmed it off, and scrapped the bone to make room for the nerves.
If you opt for surgery make sure you have a certified back surgeon, as they have knowledge in dealing with the nerves, not just removing a disc. Go for a 2nd opnion before you agree to surgery.
Most back surgery relieves the severe pain right away. The tingling is from pinched/compressed nerves. They often repair themselves, but if left go too long they may not.
I would highly suggest PT after. You will need to get into an exercise routine to keep your core muscles strong afterwards.