Thanks for using Healthcaremagic,
I have gone through all the details provided by you, and if there is deficiency of vitamin D3
and B12 it can be easily corrected do not worry about that.
You weight is 70 kg which is slightly more for your height 5'3'' so reducing weight to near ideal weight that is 60 kg would help.
You can continue the treatment given by your Physician and in the mean time if any hormonal
imbalance is suspected then you should go for hormone test.
If anything abnormal detected it can be treated.
Take good nutritious and balanced diet and exercise should be increased gradually.
If everything is fine even a masked depression
can be there so consider that also as differential.Your Physician can find out easily.
Hope this helps.
Dr.Akhilesh Dubey M.D.