Hy maybe your problem is p.i.v.d l4 l5.so u consult a physio or ortho for proper assessment.
Next Steps
I advised m.r.i l.s. spine. for proper diagnosis.
Health Tips
start the some spinal extension exercises and use hard mattresses during sleep time. avoid forward bending. u direct consult me from practo .com with your m.r.l.reportes