I was diagnosed with avn of the hips had core drilling done bilaterally.was only experiencing symptoms on left side though both hips affected.had a thr of left hip two weeks after core drilling.no relief from pain or any other symptoms.now six months out my right hip is displaying symptoms like the left did only worse.pain in groin and buttock.when coughing sneezing or other strain(such as needed for bowel movement)the hip joint feels as if it is going to explode and pain level off the charts.does this mean I need a new MRI or better yet nuclear bone scan to ensure no other joints affected as severe pain in both knees now when weight bearing and walking.also is it normal for there to be no improvement in hip that was replaced six months ago