Iron deficiency

Karlie

So my iron levels are very low and the doctor prescribed iron supplements 3xdaily. I took all three yesterday and one this morning. I asked her if slow release was ok and she said yes. Today I feel awefulllllll. I knew about possible gi side effects but I also feel light headed and kind of faint. Has anyone experienced this? I wonder if I should take normal vs slow release since it’s more than once a day.