Dear Aimemari~
Welcome to the forum, I think you are a very brave person to undertake this adventure alone. Even for people who do not have an anxiety condition it can be a pretty taxing expereince. I'm sure later on you will look back with pride at whay you have accomplished.
Within Australia there is the Hidden Disability Sunflower system (lanyard available for free at participating airports like Sydney and Melbourne, no need to send away). No medical certificate required. I use one and it attracts airport/airline staff who help me tohugh security and to the right gate.
It's not quite as good on returns as border security can be less understanding.
Within Los Angeles Airport this lanyard is not recognized often however they do offer assistance. You can contact them here to find out what they can do. A bit of an unknown quantity, I've not tried them . Again no medical certificate required.
Obviously it would be better if you were met, have you asked your boyfriend about this?
Boiled lollies ot suck as the plane descends seem to do the trick equalizing pressure, well they do at least for me.
Bon voyage
Croix
