Accidental pregnancy (advice needed)

I can really understand why you're feeling overwhelmed right now, especially with the job timing. Legally you don't have to tell your employer until you're ready, but most mums find it helps to disclose once you're past the first trimester so there's less uncertainty for everyone. The thing is, every company handles maternity differently, so it might be worth having a quiet chat with HR to understand your specific entitlements and how they usually support pregnant staff, rather than worrying about what colleagues might think. A lot of workplaces are more supportive than we expect, and honestly you've got bigger things to focus on right now than office gossip. For now, maybe take things one step at a time and see how you're feeling physically and mentally in the coming weeks, then decide on the disclosure timeline that feels right for you.

First of all congratulations on the third one and congratulations on the new job! :) I've also started a new job as well and found out that I was pregnant even before my probation ended. How your boss, HR, colleagues react to your pregnancy is something you can't control. It all boils down to company culture at the end of the day. Some people do not show until in later stages of their pregnancies so you can actually choose to reveal later on, once you are settled into your job. Hope this helps!