With my DD I had nothing while pregnant - no drops even if i squeezed!
After i had her the midwives were telling me that the babies only get about a teaspoon of colostrum with every feed (crazy i know!! thats sooo little i thought!)
After day three my milk came in fast and heavy, my boobs were crazy! hehe
My bubba was breastfed up until her first birthday!
So don't stress if you have nothing coming out now, i'm sure once bub is born you're body will make what is needed!