I have Osteoporosis in my both knees and my ankles, but theres not much that doctor can do because i cant walk too much, if you able to walk , i heard walking help to prevented osteoporosis but with so much pain it must be hard and not all sunlight its healthy for you i think the best sunlight its in the morning and late afternoon
glad you gonna have a test hope the result are good and you'll find the answer and treatment that will works for you

hugs