Welcome to HCM.
From your complaints that you have posted,it appears that you may be having intervertebral disc
herniation which is putting strain on your nerves,esp.branches of sciatic nerve
.You need to go in for X-ray LS spine and,if need be,MRI
of your lumbosacral region which will give you the exact picture.Kindly get back to me with the reports so that I can advice you further action.Take care.