I know what you mean, it can get to the point where all you can think about is how much you want that bean - maybe try taking your mind off it somehow, like go buy yourself some nice jeans that you definitely wouldn't be able to wear if pregnant or go watch a really good film that keeps your interest, something like that. I also find that going to the gym and running my arse off puts everything into perspective.
Rooting for you this month honey - lots of baby dust to you xx