I wore braces for two years. Last june my dentist took them off and gave me a retainer. A clear one. I forgot to wear it for the past two months and last night I did and it hurt like hell. Like seriously as if I had a surgery in my mouth. And when I woke up in the morning, my upper retainer was on the floor so I suppose it was kind of loose because of my teeth's shape. Should I go see my dentist?