Thanks for the query.
There is a chance of pregnancy
If the sexual intercourse was unprotected.
Please get urinary pregnancy test.
It is highly reliable and can be easily done.
You can do it even at your house.
Please meet a gynaecologist for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.