Breast milk doesn't form while you are pregnant. Your breasts will not make milk until the baby is sucking on them. It takes approximately 3 days before your milk comes in after birth. Until then, you will produce something called colostrum. It is very nutrient rich and full of antibodies babies need.

Your boobs hurt from hormonal changes.

Yes, the PP is correct. But your breasts can start leaking colostrum in the 2nd trimester in some cases. Colostrum is often clear at first then yellowish then more milky looking. My breasts started leaking colostrum (just a few drops & clearish) at 18 weeks!

I'm kind of panicking right now and could do with your advice too!
I really don't know if I'm pregnant but I have just had milky white liquid come out of my boob (literally a couple of drops as well as it being completley clear) ... I haven't really noticed any other differences to my body other than needing to wee a lot the last 2 days. I didn't think you started producing milk until late in your pregnancy?? Please can someone give me some advice?

I have had colostrum since I hit puberty. I asked my doc. about it and he said that it developes differnty for everybody. Mostly when you get pregnant but a few women get it at or after puberty.