Breast not having any sign of milk yet!

Rey
Hi all,
I am now 28 weeks, means recently started the third trimester!
I heard milk will start coming to breasts at around this time, and breast will start getting larger.
Well for me, there is absolutely no sign! And I am still the same size as before pregnancy ( B cup) !
Is anyone else in the same boat here?! I am getting worried that I won't be able to breastfeed :(