Help!!!!

So my friend won’t listen to me and is freaking out that she is pregnant when there is no way she could be... the last her and her boyfriend had sex was on the 31st of December, she started her period on the 11th of January and is about to start her period again, they haven’t sex since then.. she’s on the pill, they use a condom, and he pulls out. She won’t stop freaking out so please help me here to calm her