This is what we use, you can use it whole (bend over it for doggy) or unzip it and turn it into 2 different sized thinner wedges which makes it perfect for a variety of different positions, or just lifting your ass some for missionary.
He's got bad GERD and has been proscribed at one point 4 omeprazole a day to get a handle on it. Now he's down to 1 omeprezole a day and sleeps with that wedge on the highest tilt.
Here is a wedge pillow I bought off Amazon. It comes in two pieces, large and small, which can each be used separately or zipped together to make an even larger one.
You could try it and see if elevating your upper body and head helps with the issue.
https://www.amazon.com/dp/B08N42364Y?psc=1&ref=ppx_yo2ov_dt_b_product_details
Bed Wedge Pillow – 3 in 1 Support - Adjustable to 4.5, 7.5 & 12 Inches – Combination Zipper Technology | Memory Foam Bed Wedge Pillow for Sleeping, Acid Reflux, Anti Snore, Machine Washable
This one! wedge