Acid reflux

So I'm running out of ideas to cure my terrible acid reflux problem... I lay in my bed with my head up on pillows and then my neck hurts... sleep on the couch and it kills my back... take a time for lunch and pepcid at 7 for bed time and I'm still having problems... borrowing a recliner tonight from my cousin to see if that will help... please give me any ideas you guys have for this... am I allowed to do baking soda and water while pregnant?