AIBU to wonder where my personal data has gone?

[Perrinss]

Posting here for traffic, and a bit of advice.
I'm a member of a hobby club. For reasons best known to themselves the organiser insists that members fill out a card containing name/address/phone/emergency contact and medical details such as any medical conditions and the medication you need for it (intrusive much). She regularly calls on you to update it.
She has a little card box which she keeps on the table in front of her and thumbs through it occasionally. Yesterday at the club, she asked where my card was.
I definitely wrote one out, she put it in her little box. Now it's gone.
Out there is a card with all my personal details. I'm thinking it's a GDPR issue and would like to know how to broach this with her.

And before anyone asks, it's not a dangerous sports club, it's a bunch of middle aged women sat drinking tea and chatting over a hobby. I understand the requirement for a phone number in case the building we meet is closed or there's an issue. But she's got that on her phone, as have many of the other members. We're almost all facebook friends and text/message between meetings.

Why on earth would they need your medical details?!

Her gathering that information when it’s not necessary is a breach of the GDPR regulations in itself. My understanding is that clubs are covered by the GDPR rules and she’s in breach of a number of them by keeping unnecessary information, not letting you know what it’s used for and not keeping it secure. It’s unlawful for her to ask for your medical information.
As she is technically a data controller, she should be reporting this loss of information to the ICO within 72 hours of discovering it.
it sounds like she’s just nosey but that is not allowed. If she is running a hobby club she should be aware of her responsibilities and not use it as an excuse to snoop into other people’s private affairs.

@pinkyredrose I think it's because she's nosy. Most people in my club seem more than happy to discuss their (often extensive) medical issues, to the point that I could probably tell you chapter and verse on a few of them, no card needed!

@FeelinSpendy This is very useful, thank you. She say's she "needs" the information in case someone keels over at the club and they need to get an ambulance, although I think in that situation, some middle aged women shoving a card in the ambulance tech's face is going to be more of a hindrance.

My immediate concern over my data is that a) we meet in the back room of a pub and the room is used over the week by quite a few different groups, so if she lost it there, who knows who could of found it, and b) the organisers Son IL, who she lives with is a massive scum bag, so could go round to my house thinking it is empty, 7-10 on a Tuesday evening, if he's picked it up. (He'd be out of luck in my case, but a few members are older and live alone)