Pregnant and anemic?

Alina🍒 • Happily married. Baby boy was born 12/17/2015 and our little girl got here on 04/03/2020 ❤️
I just got a call from my doctor telling me that even though my blood came back mostly fine, I am still "a little bit anemic". My levels came in at 33.5 and they should have been at least at 35. She wants me to go on iron supplements. Did anyone have this and had a healthy baby? I was always a bit low on iron, but I had them go up high in the beginning of the year, so I thought I was finally fine. Apparently not lol