Argh. It seems like my passport may have been lost in the mail as it was en route to have my name changed.
The passport has my entry stamps, showing I've entered the UK and my DF and I have met in person (he's never been to the US, it's always been me going there).
We have my boarding passes and pictures of us in person...will this stuff be enough proof for the fiancee visa if my passport really IS lost? Or will one of us have to make another trip (which is more expensive than I'd like, since I live on the west coast) for the proof?

I tried searching, but didn't find anything about this specifically, so sorry if it's been asked before.