Well once I woke up in the morning and my husband noticed a tiny drop of blood on my white top, just where my left nipple is, he said that my boobs leaking blood instead of milk and was teasing me about it. I wasn't sure if it came out from my nipple as when I went to the bathroom and checked they looked perfect to me, I tried to squeeze it but nothing came out at all. After few weeks I noticed something similar again inside of my bra but really tiny tiny bit. I will mention it to my midwife next time.