Based on the symptoms that you describe, it sounds quite possible that your problem is being caused by a herniated disc pressing on your nerves. However, a herniated disc is not the only possible cause of such symptoms.
The condition is not dangerous because the slippage almost never progresses once adulthood is reached. Therefore, the treatment is usually aimed towards simply relieving pain. I have had good luck treating this with braces and therapy for muscular strengthening to help restore stability to the lower spine.
The lower back and the hip are close together. Often a patient will present to my office with “hip pain” that turns out to be coming from the back. I also see frequent cases where a patient thinks he is having sciatica but who turns out to have a hip problem. How can you tell the difference?
Numbness in the hand can be caused by pinched nerves in the neck, since the nerves that supply sensation to the hands come out of the neck, and they can get pinched as they exit.