Inducing peroids. Get her peroids again?

Helo doctor, My bestfriend had unprotected intercourse with her bf on 16march and took i-pill within 6hours of intercourse. Her regular period came on 3march. After consuming the i-pill, she had withdrawal bledding on 22march till 27march. She again had intercourse on 4april, protected with a condom this time. According to her peroids tracking app, her peroids should have come on 21april but it is 11may now now and still no peroids. She took 3 home preganancy tests on 25april, 27april and 30april, all were NEGATIVE. She cannot go to a doctor because she broke up with her bf and no one to talk to except me. She is under alot of stress because of this. Is it a side effect of i-pill? Or is she pregnant? Should she try to induce peroids with coriander seeds remedy shown on wikihow? When will she possibly get her peroids again? Please tell some dates and solution doctor. Please