I'm a retired pilot, not a doctor.
If you have one disc simply bulging, you are miles away from requiring surgery. Do you have any other symptoms? Pain in legs etc..
You don't mention your age and that's highly relevant.
Sitting causes the highest sustained inter-vertebral disc pressures. Bad news for aircrew.
Traction and exercise will probably help...though traction has to be very carefully administered to target the right level(s).
Some simple traction can be self administered. Lifting your torso - on straight arms, while standing at a strong table - then letting the edge press into your lower stomach can give good focus on the spot. Doing this gently, but lots of times, helps with the 'pumping action' that the disc needs. Remember, if you're in a sedentary job, the fact that it doesn't have a blood supply per se, means that it relies on being pummeled in some way.
It is almost impossible to simply hang, by any means, and relax the spine enough to do any good. Furthermore, the wrong levels will often move--to the limits of the facet joints--causing the wrong signals to be sent back to HQ. In short, don't just traction because it feels good at the time. This is a false indication of well-being.
Dieting when over-weight is important.