Oh, and savvysaver, I'm sorry to hear your DH is out of town so much during possible ovulation! That has to be frustrating. As if it isn't hard enough for us already as it is!
Last month (my 1st cycle on clomid), I hadn't yet looked at a calendar to see what day I would probably O. Well, my DH had a trip planned to GA, so I started to think about it, and when I looked at the calendar, I realized that if I O'd on cd 14 like my doc was expecting, then my DH would JUST be getting back in town the very day I O'd. I was SO upset! My very 1st cycle on the med.
We were going to miss all those days leading up to O, and then who knew whether or not the egg would even still be hanging around by the time he got home that day. We BD on that Wednesday night (he was leaving at 4am the next morning), but that was four days before my O. He got home around 4pm that Sunday and we BD right when he got home. I confirmed O with OPK and charting, so I know I O'd that day. I wonder now if we just completely missed it, as we definitely minimized our chances of conceiving because of that. It could very well be why I got a BFN last cycle, who knows! I know how frustrating that was for me, so I can only imagine if that was a frequent thing.
But look at it from the bright side... if that is the reason you haven't gotten a bfp yet, its better than having something wrong with either of you, and it means that when you do hit those O days, then you have a GREAT chance of conceiving during those cycles, so keep your chin up!