I have severe hypersalivation for almost 2 years. i lost 80 pounds. saliva is pouring out of my mouth now. please help me and tell me what type of doctor i need to see. i have already seen 11 doctors. 3 were oral specialists. who else can i see?

You have chronic sialorrhea and you have seen many specialists for this bothersome condition so I doubt we can offer any further help. You can read this link and find out if anything has missed, good luck to you: https://www.healthline.com/health/dental-and-oral-health/hypersalivation

In difficult cases like yours I have referred patients to the department of oral pathology at a dental school.