Thanks for the query.
Your spotting could be because of hormonal
imbalance in PCOS or it could be ovulatory bleeding.
If you have conceived in your previous cycle then there is less possibility for normal menstruation
in this cycle.
If you had intercourse around the period of ovulation in this cycle means around 14th then there is possibility of pregnancy
And you can go for urine test or blood test
for pregnancy to find out the possibility.