The Question and Answer section for A Streetcar Named Desire is a great resource to ask questions, find answers, and discuss the novel.
I don't think Stella initially feels trapped. Stella Kowalski, Blanche's younger sister, is about twenty-five years old and pregnant with her first child. Stella has made a new life for herself in New Orleans and is madly in love with her husband...
Blanche's former occupation was teacher. She was fired from her job before her arrival at Stella's apartment.
I'm not sure what scene you are referring to but I'm thinking he will go to the hospital when they call to tell him the baby is being born. Stella is in labour at the hospital. This would be around scene 9 and 10.