Just that, really. I recently found out I'm pregnant, stopped taking pill at the end of September and thought it would take a few months for it to happen. Would I base the date of my LMP on the date of my last bleed? That was 23rd September. I fainted on 5th October and thinking about it, I hadn't felt 'normal' since then. Would it be impossible for it to happen in such a short space of time?