matchmaking not working

so i was doing the weekly tournament, and i was doing okay. i was on the 4th level thing and then it just stopped giving me an opponent to play. it just keeps loading and doesn’t find anyone to play. so i thought it was just a tournament thing, so i went to play some regular overdrive and the same thing happened. i know it’s not my network because i can still get on the game and go through the auction house. this has been happening for 3 days now, and it’s really kinda screwed me over.