TTC and Sushi

Torie
Without sounding ignorant - it's my birthday this weekend and my husband and I had sex on a "3%" fertility day on the 3rd and 4th day after my period ended. 
​We want to get sushi, but I think it's too early to get an honest read on a pregnancy test one week after we had intercourse. The chances are slim I am pregnant, but I just am wondering if anyone has had sushi while TTC and if there is a point in doing a pregnancy test one week after we had intercourse last.