Telling employer I’m pregnant?!

Anna

When I found out I was pregnant my boss told me that when I start looking for a new job not to tell them I’m pregnant during the interview and that I needed to get a job before I started showing because they wouldn’t hire me if they knew. I had an interview Monday and didn’t disclose that I was pregnant and I have gotten the job I start this coming Tuesday. When should I disclose that I’m pregnant? I will have to ask off for doctors appointments ect how should I go about this?