How soon do you tell boss you’re pregnant again?

I found out I’m pregnant again after a year my first baby is born. It is not planned, but I’m happy as all baby is a blessing. I’m just quite worried my colleagues or boss will judge me that I got pregnant again as I sort of feel it was too soon. I’m kinda overthinker. Has anyone has the same experience? Do you tell you’re boss as soon as you know you’re pregnant or wait some more time?