Any physician who would tell a girl she has three weeks to live and top it off by telling her she is three weeks pregnant needs to be watched by the legal system.....VERY CLOSELY.
Lets avoid blaming the doctor unless we know the details. Something isn't clicking right.
You need to talk to qualified people about this. Some things one can wait on, others not. Without more knowledge as to your case....random advice doesn't seem helpful or well advised.
pregnancy is very hard to detect if it is less than a month along.. and if I were in this situation assuming this is a real situation ( just some parts are odd and hard to believe) I would worry about my life and not the babies..
You cant detect a pregnancy at less than one month. Call the nurse and discuss this with her. I suppose i don't understanding why you are asking these important medical questions in this forum when you have professionals a bell push away. Chemo will definitely stop menses and a rise in estrogen levels can be due to an estrogen producing cancer. I also don't know why you would be in the hospital for chemo,but good luck.