Does this compulsive thought pattern sound familiar to anybody?

I have been suffering from a strange thought pattern for 4-5 months that has recently become a compulsion, and has greatly interrupted my life. Whenever I hear, read, say or even think a sentence, my mind goes on a tangent of (bear with me) rearranging the first sounds of each syllable. For example, upon hearing the sentence "Hello, how are you?" my mind will rearrange sounds until it was "Lleho, yow hare ou?" I know it sounds dumb, but it's something I can't control. It just happens. And I'm no longer able to carry on a normal thought pattern because of it. Has anybody ever heard of anything like this? Thank you for your time.