Hi, sounds like you were probably scanned on the same machine, could still be technician error.
If you are now osteopenic, you may have some time to start your research and do some further testing. This site will give you some great info.
Have you been checked for underlying causes of osteoporosis? Thyroid, parathyroid, absorption issues, meds that might cause bone loss like steroids or PPI’s, perimenopause and menopause can also lead to bone loss.
For now you can make sure your vitamin D level is optimal and that you are getting enough calcium, preferably from food.
There are other supplements many take for bone health such as Vitamin K2, magnesium, boron- I’m sure I’m forgetting some.
Eat a healthy diet and exercise. Weight bearing and resistance training.
I will tell you that for the majority of people a healthy diet, supplements, and exercise will not be enough to grow bone, but this is important not only for bone health but your overall health as well.
Depending on your age and other health issues, HRT (hormone replacement therapy), may also be an option.
The most important thing you can do right now is RESEARCH.
I have yet to find a doctor that knows enough about this condition and the treatments.
You will find that you have to advocate for yourself.
Lots of people to support you here.
Good luck.