yeah, apparently im putting the mouthpiece too far into my mouth, and I have so much trouble slap-tounging because my tongue sticks out too far, if that makes sense!!
I also find that sometimes when i play for a really long time, my mouth gets so tense I end up cramping it up and everything goes so sharp or i choke the reed! its horribly painful, but I am getting better with relaxing my mouth more.
i hope good embouchure isnt as painful as bad embouchure!