Extra long period ???

Valerie

So my gf has been freakin out about her period because this is the second cycle that has been longer than usual. Usually she bleeds for only 5 days but today makes day 9 that she’s bleeding and it’s still heavy. I been telling her not to worry too much about it because I have had periods longer than that because I had really bad eating habits. She’s been looking up stuff on google scaring herself even more so does anyone maybe know why her period has changed like that ??