I have to take iron supplements as well.
In my first pregnacy I had to as well. I can not take them everyday though because they make my stomach upset or make me constipated...so I take them every other day.
I haev always been border-line anemic and suspect that my iron is low during this pregnancy (though it hasn't been confirmed by a blood-work).
Last week I was feeling really wiped out and thought it might be due to low iron, so I took some iron supplements that I had. Within half an hour, I was vomiting. I had not thrown up AT ALL during my pregnancy, so I was like WHAT?? I finally realized it was from the iron supplement.
Doing some research online, I found out that this is common. So, if/when you start taking supplements, be aware that they may cause nausea and vomiting. I even took mine with food and it did not help.
I will NOT be taking those anymore! Instead, I am trying to get more iron in my diet (red meat, leafy greens, eggs- I think?)
Good luck! I know having low iron can make you feel VERY tired...
I am also anemic but I have had problems with anemia before I got pregnant. I know red meats like beef and others are a good source, liver but pregnant women aren't supposed to eat that, beans, there are and a lot of other stuff I can't think of them all but if you look up iron rich foods I am sure you can find some websites