Sushi before BFP?!

Randi
Here's the story, my moms birthday was the 10th and my dads birthday is the 24th. For their present my sister and I were going to make a collage of pics of all their kids and grand kids. Well if I'm pregnant I want to add an ultrasound to surprise them. My sister knows I have had two faint positives and is in on it with me but we are still waiting for actual confirmation. 
Now to the sushi part, my mom, sister and I are supposed to go on a sushi date this Saturday and my sister said I should check if it's ok to eat sushi right now. I don't want my mom suspicious because she knows my love for sushi. Any advice? 
Also I will include my two faint positives for some insight on those as well. The top was yesterday afternoon and the bottom was FMU this morning.