Emma: I am so tired that I cannot fall asleep.
Mary: Poor thing. You had a really busy day.
Emma: and it's going to be like this for another 3 weeks.
Mary: you have to take some breaks, otherwise you will freak out.
Emma: I cannot afford breaks now.
Mary: But otherwise you won't even work that effectively. It's pointless. 
Emma: You're right, but I've also developed this insomnia :(
Mary: oh no
Emma: Yes, and I am constantly tired.
Mary: That sounds really bad.
Emma: I know. But what can I do?
Mary: it't not worth it. Don't stress that much, take breaks, do some sport and calm down an hour before going to bed.
Emma: I will try. I can't go on like this any more.
Mary: No, you cannot.
Emma: I'll try to sleep now, thank you my dear.
Mary: Take care.
Emma is insomniac because of work stress.