No colostrum or milk at all

Hi mummies, I just gave birth yest, i tried to bf my son but nothing come out. I even try to massage and squeeze, nothing. The nurse told me it is normal for no milk for 2 days. But i feel bad as baby wants to latch, and when latching, it can took more than 30 mins, when i let it go, baby cried as he want to latch somemore. Till i had to ask the nurse to gv him FM to make him full.. Any tips? Tia!