It will be helpful if you mention your age and whether the shooting pain is present through out the day or begins after walking for some distance.
findings are are suggestive of degenerative changes of disc with prolapse and the resultant lumbar canal stenosis. These changes are less likely to be a sequelae of your injury
Pregabilin helps reducing the shooting pain.
Strengthening of spinal flexors and abdominal muscles will be helpful as these align spine to a more accommodating position. Daily therapeutic walking (increasing the walking distance slowly) will be of help to increase the pain free walking distance(claudication distance).
Surgery is not advisable unless you have severe intolerable pain despite adequate conservative management or have symptoms progressive neurological deficit (like decreased sensation in your limbs
, weakness in your limbs, decreased control or sensation over bowel or bladder)
is not preferable in your present condition as regular exercise is sufficient to strengthen your muscles.
injection is usually given thrice a week for initial 2 months followed by once a month as maintenance dosage.