You can access your profile at any time by clicking your profile picture in the Top Navigation Menu, and then selecting Profile.
Every profile has a unique and stable URL, visible in the address bar when you visit your profile page. If you want to view your profile while you are not logged in, enter this URL.
Note that this feature depends on your privacy settings! If you set your profile as private, you will not be able to visit it if you are not logged in. In this case, you must set your profile as public for it to become visible again.