I've been struggling to get a job for months now, and I finally got hired as a sales representative. They don't know I'm pregnant. I didn't want to tell them and them possibly turn me down. It's illegal but it still happens, cause jobs need you to meet certain requirements yada yada.

I'm 24 weeks pregnant and my first day is tomorrow. I want to tell them tomorrow but I don't know how. Should I tell them tomorrow or wait? What do I do? :/ I'm so afraid of losing this job. This was the only place that was willng to give me a interview. We'll not the only place, I had a interview for a salon job but it was too far of a drive. It was hard to find.. I need advice.