It’s a very long time ago but I’ve seen a thread on here before asking this same question. IIRC medical people confirmed that tampons were often removed (but it was so long ago I don’t think mooncups were really a thing - can’t remember them being mentioned).
To the poster who said yes, just as they would test every woman for pregnancy, they need to assess everything - interesting point. There’s been great discussion on the Archers thread recently after a character was involved in a RTA and told she was pregnant (and hadn’t been aware of this). Setting aside the huge blunder of the doctor telling her in front of her husband - is it routine to do pregnancy checks without asking the permission of a patient who can consent? In this (fictional) case she wasn’t unconscious or unable to answer questions, they apparently just went ahead and tested anyway.