Iron level of 7 is actually dangerously low... Best advice get to the dr asap because you could be damaging your heart and other internal organs from lack of oxygen. I've had my iron level as low as 3 (when I was pregnant and made the conscious choice to put off IV iron treatments unless we couldn't avoid them) low iron can lead to dizziness, confusion, being out of breath and being tired all the time as said above but also has many other symptoms, odd cravings, bleeding easily or longer from even small cuts, normal low range for men and women is different but is right around 14.3 at the lowest end!!! Your body isn't getting what it needs and your risking deadly consequences if you don't get it taken care of soon!