I’m telling my friend chances she’s pregnant is a zerooooo. But she insist she is so I told her I’ll get the facts lol

She ovulated in august on the 6/7 (not sure which exact date) she had sex on the ovulation day. She thinks it was a slip up. Her period came that month I think a few days later. Then the following month it came again . Now she thinkings she’s having pregnancy symptoms lol nausea, almost no appetite, sore nips, tiredness . I’m telling her it could just be early menstrual symptoms. But she’s steady researching hidden pregnancy because she feels she is. At first I thought she was crazy 😭 but then she started sending me videos on TikTok of people who really have their periods . What you think ?