Pregnant at work?!

Tori • 2 kids. Married to the love of my life 💕
I'm going to be 18 weeks in 2 days, and I have an interview today for a new job. Im just wondering at what point I should tell them I'm pregnant? I don't want it to affect me getting the job! I have 2 other little jobs on the side but it's just not cutting it money wise