hi mrs zeg - i think it can be true - stress def plays a part in taking a long time to get preg and it did with me. i got preg on hols after 12 months on ttc at home (was not charting or anything). i think stress and worry does play a part. i know of others as well where a holiday has worked wonders!!
Also - do enjoy being DINKS - life changes a lot!!! (for the better overall but you do miss some of the good old days sometimes!)