It would be exceedingly rare for a 29 year old to have osteoporosis. Aside from genetics, there are secondary causes of osteoporosis (ie those that are not related to aging). These include certain medical diseases (hyperparathyroidism, hyperthyroidism, rheumatoid arthritis, among many others) as well as use of certain medications (oral steroids, chemotherapy, among others). At 29, these pelvic fractures may be stress-related. Are you active with sports, running? Overuse injuries can lead to stress fractures in the pelvis, which doesn't necessarily indicate osteoporosis.
I would recommend a thorough screening for osteoporosis (which includes a medical history, labs for secondary causes, and a DXA bone density scan). Discuss this with your medical provider.
Any update on this situation? Been a long while. Wondering what ended up happening.