The hip pain could be due to
osteoarthritis, tendonitis, muscle pull and strain, femoral
neck stress fractures, sports hernia or hidden/occult hernia of oblique aponeurosis, or Obturator or ilioinguinal nerve entrapment.
You would need all or any of the following for diagnosis: Clinical examination by an orthopedic specialist, X-rays, blood tests, MRI or ultrasonography.
Otherwise it can also be exacerbation of the spine problem since your last MRI.