Breast milk turning to colostrum

Ikram • Mother to one beautiful girl and a boy . Trying for twins if am lucky .

Okay so I started trying for baby number 3 months ago but I stopped breastfeeding like a week ago I am 5dpo and I noticed today that my breast milk is turning clear like colostrum and my nipples hurt I don't know if that's a early pregnancy sign please I need to know anyone going through this