Think i’m pregnant but all tests said negative...

My period was due around May 30th but never showed. I do have PCOS so it can be unpredictable but they had been regular for the most of this year until I missed my period. I did TTC on my ovulation days. But after I thought I was pregnant in June all the tests I took would say negative (I did have a few vvvvv faint positives but not everyone could see them so i just disregarded them). I haven’t gone to the doctor because as I have PCOS sometimes my symptoms mimic pregnancy and my period has been late before (just not this long). I’ve noticed I’ve gained some weight. I had a mad craving for these muffins i use to eat then after eating them i didn’t want them anymore... I also have ridiculous mood swings, along with heavy amount of discharge that’s been having some light blood in it. When I first thought I was pregnant, I had on & off nausea that just suddenly went away. Has there been any women that have been pregnant and knew it but all tests said no?