Might be pregnant and have a medical procedure tomorrow!

Camille

I have a nerve entrapped in my abdomin and have to get a steriod injection tomorrow. This will harm my baby if i am pregnant but im only 3 days late and im afraid it wont show up on a test. I have all the symptoms but I also now with my first my hcg levels were low to start out with. Will a blood test be able to detect the pregnancy if i can get my doctor to do one? Thank you for your help. I just need someone to talk to.