16yo being treated for primary amenorrhea

[JoelyB]

My 16yo daughter is undergoing investigations, has had ultrasound, swears blind she has never had a period.
She's gone away and I decided to risk her wrath by clearing out her bedroom. Wherein I found several bags of used sanitary towels?! (three bags, maybe half a dozen in each, and bits of tissue with blood on) Hidden on top shelf of wardrobe.
What is going on? I know some girls just don't like to discuss, but she's looked the doctor in the eye and told her nothing ever happened?!
She's been for a flipping ultrasound. If nothing else, wouldn't you be scared the ultrasound will show that you are lying?! We await results, perhaps it does!
I am baffled. Any bright ideas?

Oh how on earth do you link to posters? Just typed a long reply and lost the lot trying to do that :(
Biscuitz I agree it's mad. I think if a 16yo initiates contact with a service, and asks for confidentiality, then fine. They are acting as an adult. But mine is acting as a lost child, and I can't get help for her.
Armful, she is very welcome to use the washing machine as her sister does. Or indeed to throw the lot on the Rayburn or in the outdoor bins, I am not houseproud, I would never know. But somehow she seems to want me to find them
DH had a long talk with her, and I thought was great - didn't mention the periods, but the thrown away (perfectly good, unopened) snackshots.
He said, look, we trust you out with your mates, and we trust you to work in the pub (waitress, though often on bar) because we trust you to come to us if something goes wrong.
As it stands, it seems like you can't bring yourself to tell us you didn't feel like your snackshot/ ordered pizza with friends / ate an entire bar of Aero for lunch - and just put the thing back in the pantry.
That's worrying?
All she ever says is: 1) I don't know and 2) Stop making a big deal of it.

piegirl99 thank heaven someone else is dealing with it!

Op this may be way off mark but have you ever thought your dd may have aspergers? It can be very common for girls with asd to hoard sanitary protection.

Aspergers - Very much on the cards for dd1, but not this one - I think it most unlikely.
It's a real puzzle. I wondered about gender issues but she is all heels and nails this one, the other one's the tomboy.
Someone else suggested maybe she has become sexually involved in something she is now ashamed of and wants to deny the whole thing ever happened, and hence anything connected.
I don't know. I just want to get her help. But no one will talk to me because she is 16.
I tried to contact Young Minds (which is a parent, not a YP help service) - and it goes up to 25. Their helpline just says we are busy, call back. So I emailed via the website but got no reply.
I am quite desperate. She is a very clever girl, trying for Oxbridge off her own bat (not pushed or pressured) and I am very afraid she has some lurking issue which could derail her - and I can't get any help for her at all.

I’ve just found this thread. OP, I’d love to know how your daughter is doing now all these years later.