what it mean ?could I be pregnant ?

I had unprotected sex last Sunday the day I ovulated and took plan b Tuesday morning .ive been have white stretchy discharge that's getting thicker and thicker.it to the point where I feel like it's my period but it not .could it be from the start of my period or is that a sign of pregnancy?im sopposed to get my period in 7 days but idk anymore because of the plan b.i also never felt any symptoms after taking plan b.when the first time I ever took it I felt it a couple days later .