Hello everyone ? Such a question. Soon I'm going to have a baby, but …

Hello everyone ? Such a question. Soon I'm going to have a baby, but from my chest it doesn't leak colostrum even in small amounts, I know that everyone is different and maybe it will only appear on the 3rd day after childbirth, but still there is anxiety that there won't be any milk. Although the breast is big ? When did you start leaking or after childbirth? I want to read your answers and slightly relax ?