Propping up on bed for GERD ?

Hi. I've had acid reflux for 9 years (plus a small hiatal hernia). The latest symptom is a sore tongue. For sleeping, I have the head of my bed propped up 6 inches. I've also tried a wedge pillow, and I just slip down to the end of the bed. Does anybody know of anything that actually works?

Also, does anybody else have the "burning tongue" syndrome?

Thanks in advance for replies.