I'm struggling with very low iron again (ferritin is 7) so I am tired all the time, its so hard - the pregnancy ailments and side effects article has been updated with more info, check it out, some good suggestions from Nicole, BB's naturopath. She's helping me up my iron at the moment, I am on Floradix and she's also giving me something else since its so low. I'm also eating more protein, eggs for breakfast etc which might be an idea for you too.

Pregnancy Ailments & Side Effects During Pregnancy