Pages & Menus

Hi there, very new to WP. Might be a stupid question but I have done my new pages although tabs do not show across the top or anywhere. Also none show up in Pages in the Menu screen so I can’t add any menu to the pages etc. I hope someone understands what I am trying to say. I imagine it is something daft which I have or have not done but driving me mad at present. Any help or suggestions very welcome.