Late Period/ birth control

Grecia

So I’m on birth control for a year now and I never missed my period before, I usally get my period on Tuesdays or Wednesdays but I haven’t got it yet, should I be worried? Last time I had sex with my bf was on Sunday and I took a plan b since he came in me. I also took a pregnancy test because I was scared and to ease my mind, but I’m still worried. My discharge is watery, I have no cramps, or anything unusual. Someone help