No positive an missing period

Becky • #1AngelBaby👼🏼 #PCOSStruggle

So I had a ultrasound to confirm if I have pcos after been told at 17 I did, they found they can’t see anything to indicate I have pcos, which baffles me my period is like on one month and off the next and of the next months and so on in that cycle, plus been having unprotected sex for a year and nothing happening I missed my period but did a test 2 week ago an nothing in total I’m late by 20 days 😥