Lactating during early pregnancy?

Elizabeth

So this might seem like a dumb question but this is my first pregnancy. When do you start lactating/leaking colostrum? I’m only 11 weeks 3 days but when I took off my bra there was very light wet spots right where my nipples are. I am bigger chested and I feel like my breast have gotten at least a size bigger since I first found out I was pregnant. They’re also always tender to touch. Anyone been through this this early in pregnancy?