Super low iron and back to back to back babies

Mamas, I am STRUGGLING! I unfortunately have been blessed with low iron my whole life, my first birth experience was not too bad as simply taking an iron supplement worked enough to get it just under normal levels. My second birth, for weeks prior I had to get iron infusions and bloodwork because they just couldn’t get it where they wanted. Now here I am, 9 weeks into this next pregnancy and I feel like I’m actually dying. I am constantly FREEZING, even though it’s been over 85 degrees outside for WEEKS! I am exhausted to the point I can’t stay awake the whole day, like falling asleep sitting up when usually I suffer with insomnia. I cannot eat. My whole body hurts and is cramping. I’m so scared and I don’t know what to do.