I know how stressful it is, sweetie!

It's stressful enough to just TTC normally, but when you make all these efforts to get the gender you desire, it triples the amount of stress, thus making your body go all out of whack. You could BD on only the first Peak day and then don't dtd anymore after that. I think they say if you really want to get pregnant, if any Peak day you should do it on the second one. If you only do it in the first Peak day, then at least you will still have some sort of a cut-off while doing it close enough to O that there is a high chance you WILL get pregnant.
Good Luck, sweetie, I know how hard and stressful all this business is!