Anxiety relating to workplace

I'm an ICU nurse. I work in a non-friendly environment, but I'm managing it, although my mental state is not always great whenever I'm at work due to how mean my workplace is. I have a 3.4-year-old child who has been showing signs of wanting a sibling. My husband and I have been reassuring her, participating in her pretend plays, and taking her to friends with younger kids, which she really loves and would always ask us to take her to their houses. This makes me sad. We are both ready for another child and even in better positions. However, I get anxious and withdrawn anytime I think of my workplace including how I'll need to cope during pregnancy. We have started trying, but I can't stop thinking about my workplace. Plus, has anyone else been in this kind of situation? If yes, how did you manage it? If no one has experienced this before, Pls tell me how to cope. I can't any longer delay my joy or deprive my family. Thank you.