Hair loss because of vit D deficiency?? Will my hair stop if it goes back to normal?

Since 2016 july = lots of hairfall. Before that I used to have thick healthy hair. No hair disease in my family. After doing nthin for almost a year , i was depressed because of my hair loss. it was stressing me out. So i went to homedoctor 2 days ago. He told me i had vit D deficiency . It was 4 ng/ml . He prescribed me D-cure . I need to take one once a week. So my question is if Vit D is normal again , will my hair stop falling ? And will it be thick again like it was before ?