Iron pills

Cinthia • Lost my sweet baby at 36 weeks. I love you Naomi. Forever and ever, you`ll always be my first perfect baby girl. :(
My doctor told me I'm anemic which was no surprise, I've been anemic my whole life. But she told me to take two iron pills a day. Do I just buy any kind? Or does it have to be a certain one? I didn't think to ask her this so I have to wait until Monday. Thought maybe someone on here would know