Lower right back pain?

The popping out of your hip is the most likely source. You basically are slamming the head of the hip into the acetabulum (the spot where the femur and pelvis meet) This alone can cause inflammation, pain, and degenerative changes. You could get very tiny bone fragments in that area that don't show up on x-rays. When you stand, all of your weight is on that area so it will increase pain. Take tylenol or aleve, and you need to begin exercises your hip muscle (flexors, abductors, adductors, and extensors) to prevent the joint from popping out. Get with a physical therapist or just google hip strengthening exercises and start with those, but only after you beging knocking out the inflammation. You also could have some SI joint instability. A physical therapist or a chiropractor could adjust this for you