Lamblia" it is a parasite! 20% of North American get it but doctors are not accustomed to the symptoms. If you go to a third world Dr. he would prescribe a 2 pill remedy. The only drug approved for treating giardiasis
If you are taking a "Sulfate drug" such as to relieve Arthritis, you will experience burping and nausea on occasion. Before spending a fortune on Doctors, please check your medications as "Sulfate drugs" do have the unpleasant side effects described.