You are very focused on burping. Is this because you're experiencing a lot of bloating in your stomach? Have you tried antacids? They are usually also anti-gas. Another product found in the US is Gas-X, but I'm not sure how generally available it is. The active ingredient is simethicone.
If you're getting reflux at night, and it's severe enough, the acid can reach your mouth. Don't eat for 4 hours before bedtime, and raise the head of your bed 7-8 inches (about 20 cm), which will help keep the acid in your stomach.
Good luck! Hope you feel better soon.
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”