Nausea, but not in the stomach?

Hello, I was wondering if anyone can help me....

5 years ago, I had a small stomach virus, in which I only vomited twice. Now, before that, I had always been worried about it, and freaking out if anyone felt sick/vomited, but never really though about it besides that. But after getting sick myself, I found the nausea still remained...I was afraid to eat anything and was to the point of tears nearly every night at wondering why this wouldn't leave. I lost nearly 30 lbs in a month or so, and though I've gotten over the eating thing, the nausea has been with me almost every single day for 5 years...

I had an allergy test done, an endoscopy, radiation testing, etc, but nothing was physically wrong with me. I also had begun to notice that the nausea feeling was in my THROAT, not in my stomach as "normal" nausea is.  So I knew that I wasn't probably going to throw up, but still that fear of it remains...

So it began to label itself as a phobia, and I understood that, because I began to use hand santizer every 5 minutes, I would back away immediately if someone said they were feeling sick, and would come back if they answered that it was only a cold kind of sick. If people in movies threw up, I turned away and felt "nauseous" immediately. I even ran out of the room, crying, when my dad burped, but it seemed like he was going to throw up that it freaked me out. I began planning my every move, from sitting in front of classes or the end seats of movie theaters for easy escape, wondering if I should take a trash bag with me and always making sure that my 'nausea relief,' promethazine, was always with me. It's the only thing that took that feeling away, but made me COMPLETELY drowsy to the point of full on falling asleep in class. I stopped taking that a year or two ago, because of the drowsiness, but I always had to have it with me, "just in case." I switched it to a syrup form sold in Walgreens, etc about a year ago, and it really helps, but now I can't take it because of the sugar, which interferes with a new diet I'm on. It always made me feel worse though, before feeling better, so I was confused...

And sometimes it would go away for a time, which was amazing, but it'd always come back, and hit me FULL ON. I remember feeling fine, laughing uncontrollably with my friend over the webcam once, when it suddenly hit me, but the real nausea. I freaked out, thinking I was really going to barf, and that's the most extreme case, but it fluctuates...

I've seen psychologists and psychiatrists, an ear nose and throat specialist, an eye doctor, everything, and nothing has helped. I've tried Nexium for if it was just heartburn, and Paxil and other generic brands, but nothing has helped.

The psychiatrist has told me I have mild anxiety issues, but nothing seems to help, ever, and I'm writing to see if anyone out there has an answer, or a sliver of hope, for either removal of this "nausea" feeling, or even has a cure for the anxiety, so I don't have to continue planning where the exits and trashcans are, "just in case."

Anyone, PLEASE HELP?