At 24 years of age, you underwent a microdiscectomy with good results. You have now developed another disc herniation at the same level and I assume the same side. This is not unexpected as another disc herniation at the same location (called a recurrent disc herniation) occurs about 10% of the time.
If you have no motor weakness, chiropractic and physical therapy are very good avenues for treatment. You have responded very well to chiropractic treatment and there should be no worries unless you develop further pain, weakness or bowel/bladder symptoms (which are very rare).
You still have a chance of another disc herniation at the same site but don’t worry about that as there is really nothing you can do to prevent it.
Dr. Corenman