Keira - I started leaking thick yellow goo at around 15 weeks... i freaked out thinking it was an infection. Turns out it was colostrium! The doctor explained to me that all women start producing at a different time and it is quite normal, and that it is essential for the baby to get this colostrium because it cleans out their first black poo, is full of nutrition and they only need a teaspoon of it to make them feel full. Then soon after baby is born, whether it be hours or a few days, your milk will come in I found my bra's were sticking to my nipples and i'd have to peel them off, but found that making sure i've rubbed my Bio oil in morning and night has helped that problem, but sometimes i will still wake up with crust around my nipples.