Hello! Congrats on your pregnancy. Yes, u should inform your employers know and try to manage your workload. Health is a priority right now, and stress may adversely affect you. I’m in a similar situation too, newly pregnant and trying to adjust with the work requirements. Have asked to WFH during this period to get more rest. Jiayous!
Health is more important than anything else plus you are taking care of another life that is inside you. I think you should talk to your manager and perhaps something can be worked out