Hello and welcome to Living With VWD! I am sorry to hear about the difficulty that your daughter is going through - but it is great that you have taken the initiative to come here for her. I know that there have been topics in the past involving a lot discussion about issues with periods - both from patients and relatives - so perhaps looking at those could provide you with some insight! You can search through topics on this forum by clicking the search icon (top right of the red bar).
This a link to the results that come up when you search “period” on this forum:
Hopefully that helps - but definitely let me know if you have any questions or concerns!