How soon ☝️🤔👶🏼

Okay so me and my hubbie just started trying for a BABY!!! this month 🤗🤪 how soon or how early until i start taking pregnancy tests ?? I've seen woman on Glow that have a whole row of them and go from -Neg to Postive +! How is that?

Thank you girls "a head of time" and wish me luck !!!!! Fingers crossed for baby 2019 !!!!