I'm going back to work in three weeks (for four days a week). I have just found out today that I am 5 weeks pregnant with Child number 2 (not planned!). DS is 7 months. Has anyone else done this. I think it will be stressful enough going back without being pregnant. I was really sick last time and had trouble concentrating at work. I am really worried about it. At the same time I have a really good career and do not want to give it all up right now. Any advice would be appreciated.