Sharp burning, tingling, numb pain down leg. Muscle around hip and buttock are tight. Hard to walk and PT didn't help. Sciatic nerve??

Possibly piriformis. There is a small muscle in the buttock region called piriformis. This muscle overlies the sciatic nerve and if it's tight and having spasm, you could potentially experience similar symptoms as sciatica. Physical therapy has to target that muscle directly as opposed to treating lumbosacral radiculopathy. .
Sciatica. This could be sciatica, or could be a problem with the hip joint (much less likely). Check with your MD to get an emg on the leg, which will show where and if there is compression on the sciatic nerve. You also may need X ray and or MRI of the lumbar spine and hip.