PHP if statement within if statement - php

Question

I'm building a php site where i want the user to create his company.
The script is checking if the user has any companies registered already and then it should display if he does or doesn't.
If he doesnt have a registered company, he should see a form where he can register.
If he choose to register a company the script will check for any company with the same name or insert the row.
My only problem is that when there's already a company with that name the echo doesnt display.
I have written inside the code where the problem is.
<?php
$con=mysqli_connect("mysql","USER","PASS","DB");
if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); }
$result_get_companies = mysqli_query($con,"SELECT * FROM companies WHERE userid='". $login_session ."' ORDER BY companyid ASC") or die(mysqli_error());
if (mysqli_num_rows($result_get_companies) >= 1) {
while($row_companies = mysqli_fetch_array( $result_get_companies )) {
$result_get_company_owner = mysqli_query($con,"SELECT username FROM users WHERE userid='". $login_session ."'") or die(mysqli_error());
$company_owner = mysqli_fetch_assoc($result_get_company_owner);
echo 'THIS WORKS';
}
} else {
if (isset($_POST['create_first_company']) && !empty($_POST['company_name'])) {
$company_name_unsafe = mysqli_real_escape_string($con, $_POST['company_name']);
$company_name = preg_replace("/[^a-zA-Z0-9\s]/","",$company_name_unsafe );
$check_companies = "SELECT companyid FROM companies WHERE company_name='". $company_name ."'";
$what_to_do_companies = mysqli_query($con,$check_companies);
if (mysqli_num_rows($what_to_do_companies) != 0) {
echo 'THIS DOESNT WORK
It does register that is should go here
because it does not insert new row.
and when the value is = 0 it does go
to else ELSE below and insert row.';
} else {
$result_create_company = mysqli_query($con,"INSERT INTO companies (companyname)
VALUES ('". $login_session ."')")
or die(mysqli_error());
echo 'THIS WORKS';
}
} else {
echo 'THIS WORKS!';
}
}
?>