Is it possible to get a false negative with PCOS?

I’m now, according to Glow, 2 days late for my period. This year so far my periods have been regular, for the first part. They don’t come on the exact day every month but usually at the end & first days of the month I get my period. Well everytime before my period, at least in years of previous cycles, I ALWAYS get a brownish discharge which I was told is old blood. But this cycle, I didn’t get any. Which like I said, I normally do. I also normally have very strong cramps to the point I lay in bed for a whole day, or cry or even have to lay down in the bath for while. But I’ve only felt light cramping, kind of like pulling sensation in the middle & towards my groin area. My boobs also get very very sore at the beginning on my period but this time they aren’t that sore but instead feel 2x bigger. I took a test a few days before but they were negative. I know it’s still early & my period can come anytime but I don’t feel like I normally do before a period. I’ve also been VERY crabby & have to run to the bathroom to pee or i’ll pee my pants almost. So has anyone had experiences where they felt pregnant, had a negative test & then really ended up pregnant? preferably someone with PCOS.

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