Advice please

So I have decided to keep pregnancy a secret from boss as i am in middle of changing my contract to managerial (I am 8 weeks) and bc I don’t want history repeating itself - 12 years ago I got sack for being pregnant took them to court and won but I don’t want to go through this as I love my job.

Anyway my job is a full on hard working job lifting etc and she has gone on holiday left me overseeing 25 staff some have let me down already and have been working since 6am till sometimes 10pm. Yday I worked 6am till 6pm full on not even having time to eat and I’m now feeling pains and am so ill. I feel so bad and selfish on my baby. Other than this I eat very healthy gave up smoking doing everything I should. Also going through so much stress this week like just yday bank has frozen my account as I have been told someone is fraudulently trying to take money out (all I need) anyway has/or are anyone else going through stress and full on working? And am I putting my baby at risk? I really don’t feel well my body is screaming at me to stop and rest! But I know that so many women who have to deal with lots of little ones running round whilst maintain normal workloads and carrying on with work etc.. how do you do it and still feel ok?

Thanks so much for listening.