Hello, I went through you query, white discharge from vagina suggests reproductive tract infection, either in vagina or in the uterus itself, what you call it has pelvic inflammatory disease. It could be fungal or bacterial infection, this infection is causing all your problems like weakness, join pains loss of appetite, and it can't be controlled alone by calcium supplements. don't worry all can be managed with antibiotics or antifungals, please visit a gynecologist at the earliest (to avoid complications) for examination and prescription.