I keep getting a shooting pain going down my left leg staring from the top?

If pain is down the. Back of the leg, get an evaluation by pcp to rule out sciatica.
Sciatica. Pain in the distribution as you suggested describes the pattern of the nerve that travels in the leg called the sciatic nerve. The sciatic nerve is not the cause of the pain source, it is the result of an irritated nerve typically in the lumbar spine (low back) which are caused by herniated disks, spinal stenosis or degenerative disc disease requiring further evaluation by a spine specialist.