Como dizer "Quanto tempo você tem de vida?" em inglês

I went to the doctor and he said I have a serious ilness, I was told by the doctor that I problaby would die from it.

How long have you been given?
How long he thinks you have to live (then)?

And other ways to express that. Not to mention that you can also give the person a positive feedback about treatments, reference hospitals (if you know about one) and even ask if he/she have considered to get a second opinion. It doesn´t hurt to be nice and friendly.