Strange sounds

Trying new sounds, I discovered I had found a
distinctive new point of articulation (well,
new for me). I'm articulating a fricative
like this: my tongue tip is pointing down,
touching the inner face of my lower teeth
(and my gums too); the middle part (blade?)
is arched up, and touching the palatal
ridge. My upper teeth are pressed against
my tongue, my lips a bit apart, and I can
either blow between my teeth and tongue
(which is difficult) or laterally, making
my cheeks inflate. I can also make a stop
like this, maybe with some affrication
(not lateral).

All in all, the fricative is quite dental,
like a malformed /T/, but the stop is quite
distinctive. Is this a sound in any natlang?
How would you call it?


--Pablo Flores
  http://www.geocities.com/pablo-david/index.html
  http://www.geocities.com/pablo-david/draseleq.html