When should I tell my job?

april • 22 💗

I recently got hired at a new job and my first day of training is today. I did not disclose the fact that I was pregnant during my interview for fear that they wouldn’t hire me. When should I let them know I’m pregnant? I will be 12 weeks on Saturday. I won’t qualify for paid maternity leave (im part time) and i have my own insurance so i won’t really “need” anything from the company. im just worried about them firing me since my job will become increasingly more difficult the more pregnant I become. Any advice is appreciated!

eta: im a server