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.
Get started. Your symptoms are most likely coming from a disc herniation (or arthritic spur) that's compressing at least one spinal nerve root. There are other problems which could mimic that, however. Physical therapy alone may be all you need. See your health care provider about getting that started, if it appears to be indicated after you're examined.
Doubt sciatica. More likely lumbar disc disease will require further evaluation, see your physician.