I have beat the game 3 times and when ever i get an achievement my gamerscore resets and my played games resets. I have reloaded save and tried it over and over again, and it still does the same thing. Is it my Fallout or my profile?

definitely your profile, delete it and then recover, you should have your achievements

also check Xbox.com to see if they are there


If all else fails call Xbox (1-800-469-9269)