Yes if you have had sex 2 days post ovulation and you have not used nay contraception then with delayed periods, it is a possibility that you may be pregnant.
It is advised that you may undertake a urine pregnancy test on the 7th day post missed period to confirm or rule out pregnancy as it is most sensitive after 7 days.
I hope i have answered your query,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.