Can't get into any games?

I am a solo que ranked player, and I was solo que'ing ranked all day, getting into lobbies fast with no issues. I had a couple really good games with some solid tm8's (i'm D2) and all of a sudden, I can't get into any games? it just says matchmaking at 11 or 12. Did I get shadow banned or something? I hadn't had any issues all day or in the past. Can anybody help