Does sex throw it off?

I’m sure I have PCOS. I have irregular periods (sometimes even skips 2 months) and hair growing on my chin and neck. I was just wondering if anyone experiences delayed or missed periods after sex? Does protected sex and PCOS together have a higher impact on missed periods??

I had protected sex and haven’t gotten my period. I didn’t have a period for January because I have irregular periods so it was supposed to skip, but my period for February never came.

I’ve taken multiple pregnancy tests and they all came back negative. Please help. Please be nice, I am just looking for help and some peace of mind...