Ellysia,
I am 31weeks as of yesterday, and still dont have leaking colostrum like you, i read this article jut awhile ago, maybe you will get the answer from it.
Leaking breasts and Braxton-Hicks contractions
You may have noticed some leaking of colostrum, or "premilk," from your breasts lately. Some expectant moms experience this leaking, others don't. Either way, you can rest assured that your breasts are doing what they need to do to prepare for feeding your baby.
Have you noticed the muscles in your uterus tightening now and then? Many women feel these random contractions — called Braxton Hicks contractions — in the second half of pregnancy. Often lasting about 30 seconds, they're irregular, and at this point, they should be infrequent and painless. Frequent contractions, on the other hand — even those that don't hurt — may be a sign of preterm labor. Call your practitioner immediately if you have more than four contractions in an hour or any other signs of preterm labor: an increase in vaginal discharge or a change in the type of discharge (if it becomes watery, mucus-like, or bloody — even if it's pink or just tinged with blood); abdominal pain or menstrual-like cramping; an increase in pressure in the pelvic area; or low back pain, especially if you didn't have it before.
Why are my breasts leaking?
Any fluid leaking from your breasts is a sign that your body is preparing to feed your baby. What you're seeing is colostrum, a yellowish fat-rich substance that will nourish your baby before your actual milk comes in a few days after birth. Your body starts producing colostrum in the last few months of pregnancy, and any leakage is a sign that things are right on track, says Katy Lebbing, a board-certified lactation consultant with La Leche League International. "If you don't have leakage, that's normal too," she says. "It's just your body's natural way of doing things."