That sharp pain in the butt that shoots down the leg.

Maybe its the tingling and numb feelign that you get in thigh, starting up from the low back. 

Whatever it is, someone told you that you have Sciatica, and that you need to do x,y, and z to fix it.

Easier said than done.. This sciatica thing can be tricky and the symptoms you have may not even be sciatica at all.