For 2 weeks i have a milky vaginal discharge and sometimes it turns into pieces that comes out of vagina?

Any new, unexplained vaginal discharge should be professionally evaluated. See a doctor, especially if it continues for another 2 weeks or so. No sex in the meantime. Good luck.

Although vaginal discharge alone is considered NOT abnormal if there is no associated symptoms such as foul odor, itching/burning or dysuria, etc., I still think you should be examined by a GYN doc by what you describe just to be safe. Good luck.