Hello Popping is common in EDS due to lax ligament ,do not worry about it. You can apply ice take rest,and use analgesic gel,crepe bandage. Then consult doctor when available. If at young age you are having low vitamin D then there is high possibility that you will have osteoporosis Symptoms of vitamin deficiency include Bone pain and muscle weakness. However, for many people, the symptoms are subtle. Yet even without symptoms, too little vitamin D can pose health risks. Hope I have addressed your query. Happy to help further