Having trouble with Facebook?

[Jd Mn]

Well, I went on facebook and I have a total of 300 friends. But I went on today and It only showed me posts from things I had like(coca-cola, icp, blah blah blah) so anyway I went to one of my friends facebook and it said add friend even though we already were, so I clicked it and a message came up saying you are already connected, but I wouldnt show me his wall or anything, it just showed about me. Also I went to my friends list and it said I had no friends. How do I fix this? I cannot re-add them it says there already connected :/ Help would be greatly appreciated!
No I didnt reactivate or deactivate it.