Girls, hi. In the first trimester my breasts swelled and became sensit…

Girls, hi. In the first trimester my breasts swelled and became sensitive. In the second trimester and still now, my breast is like it was before pregnancy. Now I'm already 32 weeks swollen and there's almost no colostrum. Should I take vitamins? I'm afraid that after giving birth milk won't come. What do you recommend, what did others experience?