I have pink and orange discharge last couple of days it stopped two negative pregnancy test my period is suppose come tomorrow?

Confusing: Has the discharge stopped? If not, or if it returns, see your doctor. Any new, abnormal or unexplained vaginal discharge should be professionally evaluated, and colored discharge (yellow, pink [blood traces?], etc) suggests infection. At your age, STIs are among the most common causes (but of course only if at risk, like new partner, or partner with other partners). Good luck.