I need help plez this is rly affecting me alot....?

Okay I'm LOW ON IRON so I don't get a full sleep I do but I feel tired though and I munch on little bits of ice and some days I feel like I'm gonna fall over and p out and I drink some water only Brita water so is there a way of me drinking lots of water without the dullness to the water? And what is really high in iron name like everything high in iron does low iron makes my sleeps worse I feel so sleepy all the time I almost ped out typing this question