Suggest Treatment For Excessive Saliva, Gas And Bloating

I have excess saliva foamy saliva and a lot of stomach gas bloating burping. I'm afraid to swallow the foamy saliva because it causes gas. These symptoms are constant for 1 month and of ofcouse improve with strict diet advice but what is the underlying cause??
I also have four wisdom teeth that were supposed to B extracted 3 to 5 years ago. The wisdom teeth cause No pain and feel fine.