how do i prevent people from editing my form?!

i literally made another mystical pony oc form bc the other one got messed up by anon, and for some reason, I CAN'T ****ING EDIT IT
i published the new form, and when i did, it said "Anyone who has the link can edit", and i went to settings to make sure that ppl couldn't edit the form after submitting a response
later, i opened the form in microsoft edge while logged out, and i was able to edit it, meaning that anyone can!

Edit: Figured it out! :D You have to tap send, then the second icon that appears, and there will be a link. To prevent people from editing the form, you must post that link instead of the one above the tab.