Esophageal Manometry test

I've had dysphagia for several months.  I've been to my third g.i. doctor now.  I don't have acid reflux and had an upper endoscopy.  Biopsies were normal and esophagus looked normal.  I have Behcet's disease.  My g.i. doc has ordered an esophageal manometry test.  I tried once and couldn't endure the test.  It was horrible.  When gagging I felt as if I was choking and drowning.  I pulled the tube out twice.  We have rescheduled.  I am terrified of the test and shake when thinking about it.  I will be seeing a psychologist who can hopefully teach me to relax.  My doctor will prescribe a relaxer for me.  How much will this help?  Has anyone had this test and had problems like me?  How did you get through the test.  I've been praying.  I know I won't die or drown, but it's terrifying.  They have not ruled out achalasia so this test must be done.  I've read they sedate children for this test.  Does anyone know about this?  Has anyone been sedated and then awakened to do the test?  Has anyone had a sedative and it helped?  

I appreciate any guidance, links to resources, or recommendations of med. centers.  
Thanks!

[John1027]

I had the test done and it wasnt too bad even though I put it off for a year because of fear.
The key is having a good operator who talks you throught it.
Heres how to do it:

The operator gives you a small glass of water with a straw.
He inserts the tube in your nose just before the point where your gag reflex would kick in. He instructs you to starts drinking quicky and you basically swallow the straw down and you hardly even notice it!
Once its in its pretty easy to tolerate---Getting it out is the same as getting it in only he is pulling it out instead of putting it in.
Hope that helps!

[Jesusmysavior]

Thanks for the comment about your experience.  I know this test is done by so many but I went into panic mode and don't know why.  She tried it twice and I pulled the tube out both times-I don't remember doing it!  I need to have it done as my swallowing of foods is not getting any easier.

What were the results of your test?  How are you doing?  What were your symptoms before the test?  I hope you'll respond back as it's so nice to hear from others!  Thanks.