Welcome to the forums, Phredd Quark, I'm sorry that it's under these somewhat worrying circumstances however.
The eggs should be left with your hen for her to work off her maternal yearnings on, as taking them away too early will generally result in her laying more to replace them.
My lorikeet Lilly is a notorious little chronic egg layer. In 2019 she presented me with three clutches of infertile eggs, because apparently for six months of the year I'm her mum but for the rest of the time I am her “boyfriend”

You can buy some ver convincing fake eggs from
www.dummyeggs.com and swap her own eggs out, that way your hen can sit on those to her heart’s content until she loses interest and it *should* help to prevent her from laying any more. You can also boil the eggs that she's laid in order to make them a bit more durable, because she really should be left to sit on those eggs until realises they're not going to hatch and she loses interest of her own accord, which may take 5 weeks or more. Boiling the eggs also means that if she breaks them through several weeks of determined sitting, you won't have a nasty, bacteria laden mess to have to clean up off of your hen!
Once this cycle finally comes to an end, you should then remove *anything* from her reach that is even and try to decrease highly energy dense food. I'm not sure what you are feeding her now, but more veg and less fruit for example. Extra calcium would also be beneficial, you could get a cuttlebone and scrape some of it into her food if she won't nibble on the cuttlebone herself.
I know how worrying this can be so I wish you all the very best!