[UConnJulie]

Do a search for McKenzie press up protocol ... I think I've posted pictures here before, but if not then a google search will turn them up.

My opinion? Early disk injury/disease.
My advice?
1. Avoid flexion exercises for now (any kind of deadlifts, and I'd probably avoid squats too based upon the spinal loading that occurs)
2. Work on lumbar extension (via McKenzie's exercises)
3. Get the glutes working properly
4. Stretch the tight muscles ... most likely hamstrings

FWIW, I would NOT roll the lower back. The mid- and upper back, yes, but not the lower. The glutes, hams, and quads, yes.

When you start back, form is number one. Who cares what your max is if you are injuring yourself!!! Start back with corrective exercise and perfecting form. And progress from there.