Birth control?

Skyler

So I've never been on the pill before but I used an app to get a prescription and I'm waiting for my period to start to start the pill. My period is currently four days late with 2 negative pregnancy tests. Is it safe for me to start the pill or should I wait a week and take another test to see if its negative?? (I have been having unprotected sex using the pull out method which I already know leaves me at a high risk to get pregnant)