Breastfeeding Concern!

Courtney • Courtney Ann. 21. 5`7. Brown Hair & Blue Eyes. Married to an amazing man since March 1st, 2014. God is #1!
Okay Mommy's, I am 32 weeks Pregnant and have not shown any "signs" of being able to breastfeed. I'm really wanting to breastfeed but I have rather small boobs and have not had any colostrum come out, even if I squeeze. The only thing I've had is my nipples are 3x there normal size and they hurt. My question to you other Mom's out there is when did you start showing signs? If any?