Pregnancy scare ?

I had sex about 2 weeks ago sometime in the early morning ( 3 am more or less)  and the condom broke, I didnt noticed he didnt told me, That same day I took a Levonelle (around 3 pm maybe a bit earlier) it is 3 days to my period comes but I'm really scared the pill might have not worked since it was my last fertile day. Should I be worried? If I take a test now would it be accurate?