I am going to Cozumel and Grand Cayman in one week. I will not be able to dive unless I get some help for my ETD. Because of a serious illness, I have not dived in 5 years. When I went to practice Sunday, I could not equalize the pressure in my right ear. 10 feet was as deep as I could go. I did not have this problem 5 years ago, but have been having problems with ETD for a few years. I've been taking Zyrtec daily, because it used to help, but is not helping now. I can't get in with an ENT on such short notice. What can I do? I'm desperate!