Vitamin D very low.

Mercadies • Married 9-8-12!! Have a daughter born in 2007 and a boy who was born on 2-25-15
I got all my test results back the other day and everything came back good but from last time my blood was taking to now my vitamin D has dropped very low and they now want me to take vitamin D3 2,000 units everyday for the rest of the pregnancy. Anyone else have this.