Blood transfusion in pregnancy

Kelsey • Mommy to a beautiful 5 year old little girl and handsome 3 year old little boy. Another sweet Baby boy coming in May!
Anyone ever had a blood transfusion due to extremely low iron? If so, can you tell me your experience? How many you had etc. I am 25 weeks and my body just will not absorb iron from pills at all. I'm having to have my first transfusion today and just nervous and curious to anyone else's experiences.