hi ya,
well this can be difficult for you, as coming of the pill and cause this cycle to be a bit irregular, however, just a personal oppinion, when i took the pill several years ago now, it didnt affect my period at all. i was still getting a normal 30-32 day cycle. so i would go with what you think best, however long your cycle is normally, go with that and see how things go.
obviously your not late yet, sorry if i read it right you due around 15th, 16th, 17th of this month.
So wait till then and see what happens, if you are concerned hunny go chat to your Doctor, wish you all the luck with ttc.
georgette