Can you forgive yourself? It's doubtful that the flight you described would cause you to loose an IVF transfer. But get an hour or two of counseling so that next time your two are able to deal with the TTC stress together. Try an app called talktime if you have nothing better.
Relax and try not to worry about it. You still have several days of waiting. I think you will be o.k.
You say "did i screw it" -- are you asking did you screw the relationship or the possibility of getting pregnant?