I can really relate to your situation. I am now 21 and for 2.5 years I have had severe pain in my back and leg. Initially they assumed it was a herniated disk or something and so I did the physical therapy and epidural steroid injections but it didn't help. I have seen dozens of doctors, had every test they could think of and they can't find a physical cause for the pain so its likely either a symptom of a disease or CRPS/RSD. Anyway, I just wanted to let you know that I have a pretty good idea what you are going through and I'm pretty informed on this subject.
If you have really worked with good physical therapists and tried steroid injections then it really comes down to if you want to try to manage the pain for the rest of your life. Currently that is the boat I am in; in the past 2 years I have been constantly trying to find the right medication regimen with anticonvulsants, anti-inflammatories, muscle relaxers, opioids and medical marijuana. I also have to do daily PT, walk with a cane (at 21!) and constantly consider the condition in every aspect of my life... that is potentially what you have to look forward to if it gets that bad. So the question for you is whether you want to take the risks associated with surgery or try to manage it with medications and other treatments. I'm not trying to scare you at all and I apologize if I am, I just want to be real with you.
There are horror stories of surgery but as another answerer mentioned, the technology is constantly improving and the odds of positive results rising. Because you are so young, active and (I'm guessing) otherwise healthy, surgery doesn't carry a lot of the same risks for someone who is older, in poor health and who has had these problems for years. If you do get surgery, the longer you wait the more chances are that it won't help or won't help as much. The earlier the surgical intervention takes place, the better the odds.
If I were in your situation, I would probably get surgery but that position is informed by my experience of managing this for the past couple years. I don't know how bad your pain is, the emotional toll its taking on you and how it is affecting your life; I wish I did so I could give you better advice.
There are other treatments such as biofeedback, relaxation techniques, meditation, spinal decompression, t.e.n.s devices and of course medications that you may want to look into and possibly try before deciding on surgery.
I really respect the deliberation you are putting into this decision and don't envy that you have to make it. I truly wish you the best of luck, I hope some of this helped and if there is anything else someone whose been there can do for you, please feel free to email me. take care