Hi Deanne,

You should hold your urine with nothing to eat or drink for at least 4 hours, but you know this already, so yeh i'd say that it could have been inconclusive. What have your other OPK's said...was there any second line at all, getting a bit darker each one.

Are you also temping or checking CM??

I suppose if all else fails, just BD anyway...can't hurt, right?
Good luck