Hello and welcome to HCM.
Thank you for your query.
The time considered best for a fertile female to try to conceive is from 5 days before ovulation and 1-2 days after. This period is considered the most fertile period. According to the information you have provided, you had unprotected sexual intercourse 1 day before your ovulation? I am assuming "O'ed", stands for ovulation.
Another factor to shed light on is your usual cycle. Do you normally have regular cycles, or are they irregular. If this delay is unusual, then it is best you wait for a few days, and then conduct a urine pregnancy
I hope I have succeeded in answering your questions, you could write back to me anytime for further clarifications.