I do have a problem with hiatal hernia also. I have never considered a chiropractor. I really don't like them. I tried once years ago, and ended up in more pain after he cracked my back. But for me and sleeping, I have my bed elevated approximately six inches in the front. This does keep the food from coming up. They do sell blocks to put under the front of the bed. Plus I take prevecid daily, and have to take gaviscon just before going to bed.
Hope this might help.