lost of muitplayer achivments/rank

Yesterday when I went into halo 5 I had lost my multiplayer rank, REQ points and everything in my collection but still have all my stats. I tried restarting the game twice and still the same thing and when I went on today nothing had changed. I looked online and saw this happen to a lot of people at the start of the game so I was wondering if there was a fix for this.

Hard reset, usually corrects the sync issues, unless XBL is down. It should be ok today.

thx