Yep just your body gettting ready for future feeds... dont try to express any as that can make it worse and you may also notice during foreplay or sex that they may leak too... any kind of stimulation can cause this, or they can jsut leak on their own... if you havent already gotten any, i suggest wearing breast pads just incase... i reccomed good brand name ones as i bought teh cheap ones at walmart and they sucked! they were bulky and weird? lol and you dont want it to be obvious your wearing them :) and they(your boobs) may not bother you much, as you may only notice them here and there but its a good sign if you do plan on nursing in the future as you know your body is already preparing (and no it doesnt mean your gonna go in labour right away lol your body still has a lot of work to do)