you can get Eno salts, Gaviscon or...can see GP who can offer hydrosil!
when worse there are other options but I think usually one of the above would be helpful in relieving the symptoms!
try to sit upright for 2-3h after eating :)
and it's good to sleep at night on a wedge pillow (ie kinda raised on a slope, not really just sleeping on 2 pillows)!