Hello Sir, I have Gone through your History, it looks like you are having Some Muscle imbalance only,, especially Surrounding hip Muscles, when your Muscles too week or fatigue ...if you turn you may feel same kind of pain what you experienced... Plz Do isometric hip Abductors  exercises & Mild Bridging exercise & Clamshell.... You can apply hot pack ,20 min ,if you have soreness... If Pain Persists or Reoccur get Nearby Physiotherapist or General Physician for further assessment. Good luck

Take MRI or X-ray of LS for proper examination, as its wont start immediatelt, maintain proper posture , avoid long standing, forward or back bending. take rest in proper way. if doing exercises, do it properly withiut any jerks.

Hello..in your case detail  examination needed like  special tests,X ray,and if needed MRI .you can consult me online through this app also so I can tell you what are reason for your problem and treatment option also