All those who had late bfps

I tested negative at 9dp5dt on a frer. After half a day of grieving, a friend of mine who’d done ivf told me she didn’t get her bfp until 14dpt. Doctor thinks I should test again in a couple of days. Does this make sense or are they giving me false hope? I know a lot of you get bfps at 5dpt, but anyone got it later than 9dpt?