Its not milk yet its called colosturm its normal :) mine started leaking through my shirts at like 13 weeks
Its different for everyone! If they're leaking that early I would suggest getting some breast pads. At Walmart you can get Evenflo breast pads 60 ct for $6.97 and on coupons.com they have a coupon for $.75 off a box. Plus inside there is a $1 off coupon for your next box! I love them and use them all the time, and I'm 34+3 weeks!