Pcos-pregnancy symptoms

What are some of the symptoms you’ve had while pregnant with pcos. I remember having every symptom in the book once then getting my period later then normal. I’m wondering if symptoms are present because the body thinks it’s pregnant but then later realizes it’s not and then does it’s thing. I never really had a normal period until recently and it’s been a semi regular 21 day cycle. Now all of a sudden I’m 11 days late. When is the best time to take a test? How long did it take to show positive.