Need Advice on Sharing Gender

Kelly • Registered Nurse ❤️. Married since 2015. Experienced 4 losses. Rainbow baby William Logan born on Mother's Day 2017 👶
My husband was not able to come to my 12w scan and was super bummed.  I told the tech that I was hoping to do nub theory this time, and we found a very obvious penis!  Nub was straight up, 90 degrees.  Tech says it's a boy. 
Now I don't know what to do.  Do I keep it to myself, or share it with my husband who will be upset that he wasn't there? I was thinking of just running the nub theory by him and acting like I don't know for sure.