Raise the head of you bed 6" on blocks.
see if that helps.
I suffer with serious acid reflux, I have a hiatal hernia and the top sphincter muscle is partly open.
diet, weigh loss, made no difference.
I now take Mir-Acid every 36 hours, ( Omeprazole (Miracid) is a proton pump inhibitor )
problem gone away.
Life back to normal
Maybe get checked out to see what your cause of acid reflux is.