Should I or will I have back surgery?

I am 28, and I have been dealing with lower back pain for 4 years. The pain had been sporadic, but when it came, it knocked me down for at least 2 days. Since May 21, I have been in constant pain everyday, and I was diagnosed with the disc problem a week later (bulging/herniated disc). I have taken a myriad of medicines in the last 4 years to deal with the pain, I have had a round of physical therapy and none of these methods have worked. I haven't seen my pcp yet (see her in a week and a half), but the discharging doctor told me that with my history I will most likely have to have surgery. Any thoughts on if I really will have it? Also, can anyone suggest alternative methods? I'm scared of the chiropractor, but it was suggested to me recently. Thanks!