......COMMENT PLS

Wouldn’t a blood pregnancy test come back positive if you were to be 6 months pregnant?! I think my friend is crazy, her test was negative. She thinks she is pregnant because she had sex (condom broke) while fertile, he did not cum in her. And she has had period every month since then she is on her period NOW...any help?? She even had her PMS symptoms and she’s been ovulating every month.. SHE TOOK PLAN B 3 HOURS AFTER.