late period and I'm freaking out

im about 10 days late of my period. my last period ended on May 8. I had the flu from May 22-27. I also had protected sex on June 1. AF was suppose to come on June 6, I'm starting to really worry! I don't wanna be pregnant, we were really safe about it so I don't know why it would be this late. I'm usually on time.