Smoking of anything irritates your esophagus (the byproducts of combustion and the other crap in smoke), and cannabis, like alcohol, can contribute to relaxing your esophageal sphincter at the bottom of your esophagus and entrance to the stomach, which can aggravate the reflux.

FBR gave you a good overview of the drugs that are available to you. Those are safe medicines--and they're a hell of a lot safer than letting your esophagus be bathed regularly in caustic stomach acid until it begins to form cellular growths to protect itself that can become cancerous. That's a sinister and easy-to-prevent type of cancer. Are you really saying that you'd prefer that and prefer to stay in pain rather than taking a pill?

Seriously, educate yourself and you'll see that the more you can do the prevent the problem, the better off you'll be in the long run.

The other things you can do are read more about GERD. You can elevate the head of your bed slightly. Not eat anything, particularly meats, greasy foods, spicy foods, or chocolate within four hours of bedtime. Lose weight if you carry any extra. Experiment with different sleeping positions.