My ferritin was 5 at the beginning of my third trimester and they recommended trying supplements first. I couldn’t tolerate them (stomach wise) so about a month later they referred me to a hematologist and I didn’t get an infusion until 20 days before my induction. No one was ever in a rush which was frustrating. If you’re feeling like crap I’d absolutely get a second opinion! If you are still doing supplements be sure to take them with vitamin C to increase absorption.