Don’t know what to do

So AF is hopefully not coming 4/7! This happens to be my husband’s birthday. My plan is to tell him I’m pregnant at Disneyland exactly where he proposed to me. We’re going the day of his birthday so I was thinking it would be really special and just the best birthday! BUT if I test and it’s negative it’s going to be heartbreaking for me and I’ll be bummed out the whole day. I obviously wouldn’t tell him right away if it was negative- I lie and tell him af is coming a few days later so I have wiggle room for a surprise! Haha My other thought was wait a few days test and if it’s positive we can just go back that week. What would you ladies do?! I’m so torn!!