Need to know before test with radiation!

Tessa • New wife and loving life!

Hey all. I am getting a HIDA scan tomorrow because I’ve been having digestive issues. You’re not supposed to do it while pregnant. I just took a test and it came back negative. I’m supposed to start my period tomorrow. I took a cvs brand test and it said negative. I Just want to make sure I’m not pregnant before tomorrow morning. What do you guys think?