How to ease the anxiety and the embarrassed feelings?

I have been perplex for years thay the embarrassing and awkward stuff always emerge out of my control in the night, therefore I cannot fall asleep less than half even one hour. Every time after closing my eyes, all the embarrassing moments and memories rush into my mind, such as mistaking somebody years ago, a failure joke last month, even a silly question I have mentioned last year in Fluther.
Is there some suggestions to overcome the disorder or at least alleviate such situation?