Let's assume someone has a big problem and is dealing with it. While he/she has not solved the first problem, another problem comes up and adds to the previous one. I wonder how you would explain this situation through an idiom / an expression or even a proverb in current English?
I know the expression: "double whammy", but it indicates two problem "at the same time", while I need to indicate that while the first (often big) problem has not solved yet, another (often big) problem appears.