If you don't fix it- eventually you are going to become anemic. Yes, you can take iron supplement by mouth 3x/day. But most importantly is to find why your iron is low. You should have a GI work-up- egd
and colonosocpy and check your urine- to check blood in urine
. If + blood in urine- you need imaging
study, perhaps urologist etc. Go to see gp.