Hi, sorry no one has answered your question, here are my ideas as someone who had great burping problems...
The burping means you are not digesting what you eat. Try keeping a record of what offends your system. This will help manage the symptoms but not cure it.
To cure it you need to have a better functioning digestive tract.
How is your diet? It should be have a very heavy emphasis on vegetables and avoid: sugar, white flour and baked goods, sweets, pasta etc etc. Eat more vegetables and fruits. Avoid processed foods, artificial additives, artificial preservatives etc. Avoid soda, coffee, alcohol.
Do you have candida issues?
Did you do parasite cleanses?