First of all you should visit a manual physical therapist because it's a case of chronic pain. Need some evaluation test or answer 1.do you have sone stiffness in your back, in the morning when you wake up? 2.Do you have any history of fall or any other  injury? 3.Do you have any history of muscle cramp? 4.straight leg raise is painfully or not? 5.Is there any pain which increases during coughing or sneezing? This are the some question I hwants to know as a physical therapist then I will go for further investigation.