Php form not registering

I think im utilizing php oop right, however its not redirecting the page to the profile.php page it just goes blank after i submit.

No error message shows, i wonder what im dong wrong.

Could it be a session problem ?

index.php

<?php
error_reporting(-1);
require_once 'layouts/header.php';
require_once 'User.php';

session_start();

if (isset($_POST['btn-signup']) ){

    $username = htmlentities($_POST['txt-username']);
    $unpass = htmlentities($_POST['txt-password']);
    $password = password_hash($unpass, PASSWORD_BCRYPT, ['cost' => 12] );
    $unemail = $_POST['txt-email'];
    $email = filter_var($unemail, FILTER_VALIDATE_EMAIL);

    $guest = new User();

    if($username ==""){
        echo "Enter a Username";

    }

    if($email == ""){
        echo "Enter a Email";
    }

    if($password == ""){
        echo "Enter a Password";
    }

    elseif($guest->signup($email,$password,$username)){
        header("Location:profile.php");
    }
}


?>


    <div class="container">
        <div class="row">
                <form action ="" method="POST">
                  <div class="form-group">
                    <label for="Email">Email address</label>
                    <input type="email" class="form-control" aria-describedby="emailHelp" name="txt-email" placeholder="Enter email">
                  </div>

                  <div class="form-group">
                    <label for="Username">Username</label>
                    <input type="text" class="form-control" name="txt-username" aria-describedby="emailHelp" name="txt-username" placeholder="Enter Username">
                  </div>


                  <div class="form-group">
                    <label for="Password">Password</label>
                    <input type="password" class="form-control" name="txt-password" aria-describedby="emailHelp" name="txt-password" placeholder="Enter email">
                  </div>


                     <button type="submit" name="btn-signup" class="btn btn-primary">Submit</button>
                </form>


        </div>
    </div>


</body>
</html>

User.php

<?php

require_once 'Db.php';

class User extends Db{

    private $db;

    public function __construct()
    {
        $this->db = new Db();

    }


    public function signup($email, $password, $username)
    {
        try{
            $stmt = $this->db->connect->prepare("INSERT INTO users (user_email, user_pass, user_name) VALUES (:email, :password, :username) ");

            $stmt->bindparam(':email', $email);
            $stmt->bindparam(':password', $password);
            $stmt->bindparam(':username', $username);
            $stmt->execute();

        }

        catch(PDOExeception $e)
        {
            echo $e->getMessage();
        }


    }


}

Db.php

<?php 

error_reporting(-1);

class Db{

    private $db_host;
    private $db_user;
    private $db_name;
    private $db_pass;

    public function connect()
    {
        $this->db_host = "127.0.0.1";
        $this->db_user = "root";
        $this->db_pass = "root";
        $this->db_name = "eli9";

        try {
            $db = new PDO("mysql:host=127.0.0.1;port=8889,dbname=eli9", 'root', 'root');
            $db->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
            echo "connected \n";


        } 
        catch (PDOException $e){
            echo $e->getMessage();
        }


        return $db;

    }


}