Some jobs can be more stressful than others. Usually the high paying ones comes with more stress, too. A friend had been unsuccessful in natural conception for 5 years, and aided conception for 2 years, and one round of failed IVF.. Finally she quitted. In her second round of IVF, she was successful. Luck, or related? Nobody knows.
But do consider this. If you quit, would you be able to live comfortably, without financial worries, say, for the next 2 years?
If yes, then, my advice is this. Money is considered "easy to earn, easy to lost"... time and tide waits for no man (woman!). Consider your own circumstance - high paying job is one thing, but I we want to have children, our clock is always ticking. Countdown.