Starting new job but found out to be pregnant before start work

Hi Mummies, I just found out I’m 9 weeks pregnant and going to start a new job in 2 weeks. I wasn’t pregnant during interviews and accepting the offer back in late December hence I’ve tendered and been serving notice while waiting to join new company in mid Feb. *I have married 2.5 yrs and this is not a plan pregnancy so somehow it’s still a happy thing but kinda stuck due to the current situation where I’ll be switching to new job soon. Wondering if I should inform the new employer now or just tell them on the 1st day? Appreciate mummies who had similar experience to share your advice. Thank you! #1stimemom #advicepls