Lily,
Wow! I'm not sure what to tell you. I do think though, that until you see AF, assume nothing

I wish I knew more about progesterone levels, but since I don't, all I can do is tell you I'll be thinking about you. Don't assume you can't get pg with progesterone levels that low, or that you're not pg because of a neg test. If your hormone levels are that low, then you would get a neg pg test if you were pg, so keep that in mind. I'll be thinking happy pudgy baby thoughts for ya. Enjoy your trip.