Vitamin D3???

Ab

I’m 31 weeks pregnant and my midwife really wants me to take a vitamin d3 supplement. She feels it’s necessary because she believes everyone is vitamin d3 deficient because we don’t get enough sun on a daily bases. With that being said I’m constantly outside with my toddler and I don’t wear sunscreen to block the sun. Has anyone taken vitamin d3 while pregnant, is it really necessary?