hello everyone, was just wondering could anyone help me out with my dates. I have pcos and therefore have extremely irregular periods so i dnt hav an lmp. my first scan gave me a due date of 28th july and my third scan gave me a date of 18th july. would both these dates mean i conceived in october as im convinced thats when it happened as i had sore boobs the end of october begining of november which was my first clue that i may be pregnant.