Pregnant ?

Hi , I took plan b (03/23) week after my period (03/15) experienced withdrawal bleeding week after 2 days after that experienced a light pink discharge, I have on and off cramping , little nauseous , super tired , been sleeping all day every day this week and eating , now April 5th-6th I'm experiencing milky discharge stretchy , I did some research it can be early sign of pregnancy. Taken two test both came out negative, and my period is due next week on the 15th , is it possible I'm pregnant ? should I wait to test again .