wasRecentlyCreated in PHP not detecting newly created campaign - php

Question

I'm currently working on a form to create a campaign and would like for the form to detect whether the user has already submitted the form and to display an alternative message.
I have the following if statement set up to determine what message to display to the user:
if ($campaign->wasRecentlyCreated) {
$response['message'] = 'Campaign edited successfully';
} else {
$response['message'] = 'Campaign created successfully';
}
I've tried other suggestions that I've also seen on stack overflow such as the following:
$campaign->exists === false
$campaign->getDirty
$campaign->getChanges
with the if statement stated earlier in the post, it's outputting the first message "Campaign edited successfully". This message displays, even though I haven't yet created a campaign. When I try submitting the form again and again, I get the same output message over and over again. Each time I click the save button, the entry is being saved into the database.
Any suggestions would be appreciated. Thanks.
Additional Code:
if ($_REQUEST['id']) {
$campaign = Campaign::find($_REQUEST['id']);
} else {
$campaign = new Campaign();
}
$campaign->name = $_REQUEST['name'];
$campaign->is_draft = $_REQUEST['is_draft'];
$campaign->is_closed = $_REQUEST['is_closed'];
$campaign->summary = $_REQUEST['summary'];
$campaign->requirements = $_REQUEST['requirements'];
$campaign->additional_details = $_REQUEST['additional_details'];
$campaign->key_information = $_REQUEST['key_information'];
$campaign->opportunity_type = $_REQUEST['opportunity_type'];
$campaign->number_of_stores = $_REQUEST['number_of_stores'];
$campaign->logo_image = $_REQUEST['logo_image'];
$campaign->started_at = Carbon::parse($_REQUEST['started_at']);
$campaign->ended_at = Carbon::parse($_REQUEST['ended_at']);
// only set this when saving a new campaign
if ($campaign->wasRecentlyCreated()) {
$campaign->member_id = $member->id;
}
$campaign->save();
$members = $_REQUEST['members'];
// only do this for a newly created campaign
if ($campaign->wasRecentlyCreated) {
if (!array_key_exists($member->id, (array) $members)) {
$members[$member->id] = CampaignMember::ADMIN;
}
}
$campaign->addMembers($members);
$campaign->addCategories($_REQUEST['categories']);
if ($campaign->wasRecentlyCreated) {
$response['message'] = 'Campaign edited successfully';
} else {
$response['message'] = 'Campaign created successfully';
}