Severe Anemia

Marieka • Momma to a prince & soon to be twincesses💙🎀🎀
I've always been anemic and with my son I took iron supplements but was told iron supplements isn't enough for two babies so I had an Iron IV transfusion yesterday and was told I'd feel better, however I feel completely awful.. I've had a migraine since yesterday and cramping.. does anyone know if this is normal or not!!?
31 weeks with di/di girls.