Please do not give up, and please do talk to your doctor about even a one-time referral to a physical therapist or similar professional. My father had one back surgery more than a decade ago and gave up on exercise due to the discomfort...and that only led to more pain and discomfort along with a gain of 150 pounds and two more back surgeries. Unless you were given a permanent and total disability rating, the pain you're still experiencing may be the result of something that still needs medical address.
While I do not have first-hand knowledge of what you're going through, I've watched a love one go through it, and my heart goes out to you! Please, though...please praise yourself for the hard work you've already put in (you lost 53 pounds! Celebrate, honey!) and use whatever resources you have to get an exercise program pieced together that takes your unique needs into account.
Do you have easy access to a pool? Do water-based exercises hurt?
Starting: 41.1 BMI and extremely sedentary
Current: 30.4 BMI with strength-training and low-impact cardio
Mini-goal: 29.9 BMI (about 164 lb) and 5K walk or run
Mini-goal: 24.9 BMI (about 136 lb) and half-marathon walk or run
GOAL: 23 BMI (about 125 pounds) and marathon run!
| current weight: 165.6