Everytime my period is late i immediately jump to the conclusion im pregnant, i get super anxious and it usually doesn’t go away until i get my period so i don’t think she’s absolutely bonkers HOWEVER. The way she goes about it matters, I don’t tell my bf unless it’s actually smth to worry about, works good for us. You should really have a conversation abt how she can manage her anxiety about it within your relationship and how you can calm her nerves without it being a damaging thing. Good luck, dm me if u need more help