Did I Get Sciatic Pain In My Back Due To The Injury Caused By A Fall?

I had a bad fall this past Jan. and dislocated and fractured my right shoulder and tore 4 tendons but not serious enough for surgery. After the tremendous pain finally eased up after 12 wks, I noticed sciatic pain that kept getting worse and worse until it is unbearable now. MRI findings are L3 central disc protrusion and severe narrowing at L4-L5 -- I forget what it s called -- foramen? I have hx of arthritis and RA bulging and degenerating discs, just like everyone else. But this pain is so bad and it s in my low back and my buttock and deep within both hips (whichever side I lie on) and down the left leg behind knee to outside of calf. Some sciatic pain all my life with L4-L5 radiculopathy down both legs intermittently, but this pain requires constant meds in order to sit in work all day or to even get through a day. What s the tx for this type of disc injury and could it have been caused by the fall (sciatic pain wasn t felt until 5 months after the fall after I moved an overstuffed chair by pulling it into another room about 20 ft). Thanks.