Mood swings during tww

Hi ladies we are on our 20th cycle ttc. I haven't oed yet, will do so around Monday as my cycles are very regular (down to the hours actually) but I have a question. I read somewhere that if the egg isn't fertilized and it starts to break down during the tww there are negative mood swings. I notice this all the time. About a day or so after I o, I tend to get really snippy and rude towards my fiance. It dosen't last the whole tww (that is until the pms kicks in) about a day but I notice it everytime. I was wondering though. Does anyone else experience this? Any mommy's out there who noticed this during their tww? Or how when they got a bfp their moods were different during the tww?