Ay normal lang yan, mama! At 24 weeks some moms start producing colostrum na, at sobrang common na mas marami sa isang side kaysa sa isa, walang dalawang tits na exactly pareho haha. A few of us had the same thing and it continued even after birth, walang problema sa breastfeeding. But if it's causing discomfort o may redness or itching, better check with your OB just to be sure, especially if may unusual color or smell na hindi normal colostrum. Enjoy ang preparation phase na!