If you ask Dr Google, you have 1000 of diagnosis for each symptoms and you diagnose what you like or you feel like. You study and practise 8-10 yrs only to correctly diagnose and treat. That apart, osteopenia may not have any symptoms and diagnosed only after fracture post menopause or you do bone scan or diagnosed incidentally on Xray. It might be just weight gain also. So please consult a good specialist.