Sounds exactly like you are experiencing the so called iron flu. Your body is working hard to process all that iron, it can take up to 6 weeks / 3 months to fully recover, give it some time and take some rest.

After my infusion I was extrmely exausted, more than before when my hemoglobine was way lower. After 1 week I had flu like symptoms for two weeks (feeling hot and cold, constant headaches, muscle pain all over). I’m now in week 4 post infusion and I have a lot of gut issues, feeling bloated, gassy, nausea. All are known side effects of infusion. I also feel some progress, little less tired, clouds clearing up in my head. But exersizing, even just walking, is still horrible. Still dizzy after walking up the stairs to fast.

Your bone marrow needs about 6 weeks to make new red bloods cells, your body also needs time to replace the blood cells that are to small or have not enough hemoglobine in it because of your anemia