I'm allowed to travel once I get a BFP or BFN. I see no problems flying. Personally, I always opt out of the body scanner but I don't think that's a necessity. I'm just kind of old fashion like that I guess. I would worry about the stress though... is there any other way to get to the conference? I believe that Xanax and Valium are both dangerous during pregnancy
but I'm not positive on that. If you need to fly I would just do whatever you can to minimize your stress level - listen to relaxing music, meditate, eat junk food, whatever you can! If I were you I would still go and feel fine about it if that helps any. I'm sorry you have to think about it. Like IVF isn't stressful enough!