Stephen Casper

I've been having issues with my eustacian tubes being blocked . They open up for a short while , then block up again . Been to 3 doctors . One says hold my nose and blow. Nothing happens. But hurts. Other doctors prescribed antibiotics nose sprays, antihistamines, Sudafed, Neti pot. Nothing seems to be helping.any advice would be appreciated. I'm going back to ENT in 2 weeks.