Breastfeeding while anemic

Madai

Hello. Have any of u experienced anemia while breastfeeding? I'm concern I might be anemic and have started to take some iron already should I be concern for my baby too? I do supplement with baby formula. I can't tell if my baby looks a lil pale too or if I just his skin tone :/ Also do u know how they test babies for amenia? Do the take blood from his veins or just a poke in a finger??