Pregnant?

Hey guys! I had sex last time on january 2nd and my period needed to come on 13 th, but it didn’t so i took 2 pregnant test on 16th and 18th this month and they were negative. I still haven t got my period.

I know it may be early, but i am concerned because I am 17. We always used protection and checked the condom after sex.

What can I do? Besides talking to my parents