So I'm currently breastfeeding, but really struggling to gain weight. My doctor has told me I'm not healthy enough and it can affect my baby girl. I'm 5'1 and have never been a big eater or weighed a lot. But I used to weigh roughly around 8-8.4 stone, but have gone down to 7.4 stone and just can't manage to get it up from that, despite eating better, and more often