Kim - I was told that also at every check up - i was also told that it will fix its self eventually - but i didn't want to take any risks - and risks B have speech problems etc later in life - so i thought while she is little may aswell get it fixed - i thought about it ALOT!!! and now im SO glad we got it done!
she had a V shape when sticking her tongue out!
Its totally up too you but in all honesty - i recommend getting it done!