Lower back and hip pain. This could be!

I am having lower back pain which goes into legs. This is on and off pain. I have in both legs. I got lumbar mri done and report is Intervertebral discs: Multilevel mild disc desiccation changes noted at L4-5 and L5-S1 levels, as evidenced by loss of normal hyperintensity on T2 Wt images. L4-5 and L5-S1: Broad based disc bulge  noted with resultant mild anterior thecal sac compression. No neural foramina stenosis or nerve root impingement. Rest of the intervertebral discs are normal. Rest of the dural sac, nerve roots, neural foramina and spinal canal are normal. The bilateral visualised sacroiliac joint and hip joints appears normal. Impression:    1.  L5 lumbo-sacral transitional vertebrae (sacralisation - type Ib). 2.  L4-5 and L5-S1 level shows broad based disc bulge with anterior thecal sac compression. Still I am having pain some times and it is like heavy feeling around hip. It is coming on both the sides. What this could be