Are you sure you actually sleep well? Not trying to wind you up but usually if people sleep well they can handle stress much better - sleep builds resilience for us. I'd try a "good" sleep tracker if you don't already have one to see how performant your sleep actually is. If your sleep _is_ good then I would focus on improving resilience through meditation, exercise and mindfulness (live in the moment, recognise you cannot control some situations etc). Cheers