Why do we get L4/L5 disc compressions and subsequent bulging/herniation of disc and nerve inflammation:

Disc Herniation

When you have an asymmetrical pelvis you have one side of the pelvi that posterior tilts (superior aspect moves back compared to inferior ischial tuberosity which moves forward) and then shifts anterior in relation to the leg (which rotates lateral). The opposite side pelvi tilts anterior and develops a posterior shift in relation to the leg. The femur rotates medial in this relationship.

Now how this applies to you is that the sacrum is dragged along with pelvis and must sidebend to the posterior tilted side and rotates towards the anterior tilted posterior shifted pelvi. L5 must travel with sacrum (unless there has already been major trauma or surgery) due to its fascia and the only choice for the body is for 4th Lumbar to do a complete reversal (counterrotation). This forces L4 closer to L5 as the upward support for the thorax fails and this weight collapses into the twisted lumbar region. Usually L3/L2 reverse this counterotation and you get a bulging disc here as well. Structural Integration is the only answer to reverse this pattern. Period. I would have studied something else if something else worked.