conceiving issues

My period has always been irregular but it never exceeds being late by 5 days. By day 5, I atleast always start spotting but not this month.
My SO and I have been trying to conceive for 5 months now and I really thought this month was the month. I had so many weird symptoms that I've never experienced before and no signs of my period starting. With two negative pregnancy tests I decided I would go to the doctor tomorrow. Well turns out after 9 days of my missed period, it came out of no where. I'm just really sad because although the tests said negative, it just felt right if that makes sense ? I also know that a good amount of women do not always show positive on a pregnancy test until about week 7 or 8 of the pregnancy so I was hoping that would be me
I just was really wondering how many women have conceived while having a very irregular period ? And how hard was it for you, because it's just so disheartening for me every month being late on my period getting my hopes up.