Facebook Privacy? HELP?

[Muffincake]

People whom I am not friends with can search up my name, click on my profile and see EVERYTHING. My wall, my photos, my info, my friends! I went to privacy setting and went through EVERYTHING yet strangers don't even have to add me, they can just go through my profile!! HELP...this is really creepy! I know this because someone in class looked up my profile and saw everything (but I don't have them as a friend) google and facebook help center ISN'T WORKING
I did go to privacy settings (LOOK AT THE DESCRIPTION) and I went through all of the tabs, they are ALL on friends and people can still see. Can you give me a step by step how to do it? Because it ain't workin