Have strange tongue sensation--tongue feels unsettled, sometimes it feels like its moving. Feels like I'm not pronouncing or enunciating words especially those starting with "s" mcorrectly. No one else hears this..maybe in my own mind--anxiety. No problem swallowing or slurred speech, nothing no one has brought to my attention. can this be an allergy--perhaps from green tea. This has been going on for the past few weeks and I've been drinking fresh loose leaf green tea since late April.